Запасы макрофитобентоса охраняемых акваторий города Севастополя

Assessment of carbon stocks in vegetation and soil is a basic step in evaluating the carbon sequestration potential of an ecosystem. We collected soil (core and composite) samples from 0–10, 10–20, 20–40, and 40–70 cm depths, or down to the bed rock, in the soil profile of four types of forest (managed dense Shorea (DS), degraded forest (DF), pine mixed (PS), and Schima–Castanopsis (SC) forest) and two types of cultivated land (irrigated low land (Khet) and rain-fed upland (Bari)) in the Pokhare Khola watershed of Nepal. In addition to other essential properties, soil bulk density and carbon concentration were assessed. Fine roots were also collected from each sampling site. The biomass of standing trees and shrubs was estimated by using allometric relationships after measuring their diameter and height, while the biomass of grasses was estimated by a direct measurement of grass from a defined area. The carbon stocks in all forest vegetation (trees, shrubs, and ground grass) and in the soil profiles under different land uses were estimated. The vegetation carbon pool was largest in DS forest (219 ± 34 Mg ha−1) and least in SC forest (36 ± 5 Mg ha−1), while its order among forest types was DS > DF > PS > SC. The soil organic carbon (SOC) pool was largest in Bari land (15.7 ± 1.5 kg C m−2) and least in PS forest (6.2 ± 0.5 kg C m−2) but the overall order among land uses was Bari > DF > Khet > SC > DS > PS. The total SOC stock in the whole watershed was 59 815 Mg, of which 36, 32, and 32% were in the 0–20, 20–40, and >40 cm soil depths, respectively. In the surface layer (0–10 cm), SOC stock was highest in Bari (36%) followed by DS (31%), and least was in PS forest (3%). This distribution pattern can primarily be assigned to SOC concentration and area covered by these land uses.

Carbon stock assessment in the vegetation of forest ecosystems has attracted worldwide attention following their role in the mitigation of greenhouse gas and climate change. The aim of the present study was to assess the total carbon stock of trees in the Chitteri reserve forest of the Eastern Ghats in India, based on tree inventory. The entire stretch of the forest covering 742 km2 area was divided into twenty grids of 6.25 km × 6.25 km, and from each grid a transect of size 5 m × 1000 m was established. A total of 5022 live trees (≥ 9.5 cm diameter at breast height) representing 143 species were inventoried from the twenty transects (totaling 10 ha). Carbon stock of each tree was determined by a non-destructive method following standard allometric equation using the tree diameter. The total carbon stock of the tree vegetation for the 10 ha sampled in the Chitteri reserve forest was 585.50 tonnes. The average carbon stock for the twenty 0.5 ha transect was 29.28±21.7 tonne. The minimum and maximum carbon stock estimated for the 20 transects was 1.98 t/0.5 ha and 76.89 t/0.5 ha, respectively. The average carbon stock sequestered by a single tree was 0.12±0.24 t/tree. The maximum carbon value was observed for Mangifera indica (1.73 t/tree) and the minimum was for Glycosmis pentaphylla (0.01 t/tree). However, overall contribution to the total carbon stock of tree vegetation in the Chitteri reserve forest was observed greater for Memecylon edule (8.5 %), followed by Canthium dicoccum var. dicoccum (7.4 %), Anogeissus latifolia (6.4 %), Albizia amara (4.9 %) and Mangifera indica (4.4 %). A significant strong positive relationship was observed between carbon stock with tree density (R2=0.689), but not with tree diversity (R2=0.422) and with altitude (R2=0.399) of forest location.

The results of the study of 137Cs and 90Sr content in forest litter of oak forests of the near zone of the Chernobyl nuclear power plant within the boundaries of the protected area of the Polessky State Radiation and Ecological Reserve of Belarus are presented. In 2021, before the beginning of leaf fall, the total 137Cs stock in the litter of oak forests in this area was estimated at (1.65–2.02)×1012 Bq, 90Sr – at (0.51–0.80)×1012 Bq. The specific weight of 137Cs accumulated in them was 40.5–45.1 % of the total radionuclide stock in the biomass of phytocenoses and 49.8–54.7 % of its total stock in terrestrial and aboveground biomass, 90Sr – 33.4–50.4 and 39.3–56.8 %, respectively. The radionuclide content in forest litter of oak forests is spatially extremely heterogeneous. The range of fluctuations of specific activity of 137Cs in them reached 19.4 times, 90Sr – 96 times, 137Cs stock – 30.5 times, 90Sr – 146 times. The radionuclide content in forest litter increased in the typological series Quercetum sublveto-fluvialis – Quercetum oxalidosum – Quercetum aegopodiosum – Quercetum graminoso-fluvialis. Individual values of 137Cs stock in individual forest types varied within 5.5–11.1 times, 90Sr – 2.7–69.5 times. 137Cs and 90Sr stocks in forest litter of oak forests are related to their specific activity in 20-cm soil layer, distance to the point of emission, growing conditions, productivity of stands; 137Cs stocks – to the thickness and biomass of forest litter; 90Sr stocks – to the share of deciduous species admixture in the composition of stands. Weather-climatic factors have a significant influence on radionuclide retention by forest litter.

The coastal areas are renowned for their exposure to strong winds, salt sprays, and blowing aeolian sands, collectively posing threats to farming and the health of residents. Well-established coastal forests offer protection to alleviate these adverse effects and provide various ecosystem functions, such as carbon sequestration and soil conservation. Soils account for approximately 74% of the carbon stock in terrestrial ecosystems. Consequently, even a subtle increase in soil carbon can lead to significant carbon sequestration. Reforestation is considered a suitable practice to enhance both above- and belowground carbon sequestration. However, the benefits of reforestation in coastal areas are hindered by land subsidence and seawater intrusion due to over-exploitation of groundwater for fish farming or manufacturing. To overcome these obstacles, a reforestation practice known as the "ditch-and-embankment technique (D-E technique)" is adopted. This technique involves reforesting coastal lands suffering from land subsidence by constructing inter-parallel ditches and hills. By applying the D-E technique, soil properties can be improved through salt leaching, and soil organic carbon (SOC) stock can be enriched by organic matter inputs from reforested trees. However, the effectiveness of this technique in terms of soil carbon and soil amelioration lacks sufficient evidence. In this study, we investigated the soil carbon stock and soil salinity of a 15-year-old coastal plantation, consisting of four dominant species (Casuarina equisetifolia, Millettia pinnata, Melaleuca leucadendra, Cerbera manghas) established by the D-E technique on the western coast of Taiwan. Soil samples from hills (O horizon and mineral soil) and ditches were collected using soil cores and a piston sampler. A proximate submerged forest was used as a reference baseline. Soil carbon was determined as organic, inorganic, and elemental carbon with a TOC analyzer. Soil salinity was measured in terms of soil pH and electrical conductance (EC1:5). Our results showed that the D-E technique could increase the total SOC stock (O horizon + 0-50 cm mineral SOC) to an average of 48.38 Mg C ha-1, compared to the submerged forest (12.22 Mg C ha-1). The total SOC stocks of hills ranged from 38.02-60.33 Mg C ha-1, significantly higher than the submerged forest, irrespective of species, although there were no significant differences in total SOC stocks between species. Consistent with total SOC stocks, mineral SOC stocks of hills (13.91 -24.49 Mg C ha-1) were generally higher than the submerged forest, with only those from Cerbera manghas and Millettia pinnata being significantly or marginally higher. The similar amount of total inorganic carbon stock between hills and the submerged forest further supported the contribution of reforestation. Soil pH at the 0-5 cm layer of hills was lower than in the deeper soil layer and soils from the ditch. Additionally, EC generally were lower at soil at 0-5 cm or 5-10 cm layers, suggesting the occurrence of salt leaching. In conclusion, our preliminary study suggests that the D-E technique could be an appropriate reforestation approach to establish coastal plantations in areas subject to land subsidence, meeting multiple objectives, including protecting residents' well-being, soil carbon sequestration, and soil salinity amelioration.

The condition of community-managed forest areas varies according to biophysics characteristics and management activities. This study aims to investigate the condition of vegetation and soil carbon stocks of various types of forest management by the community in Karang Sidemen Village, Lombok, Indonesia. In the study area, it was found 4 types of landuse management, namely; dense forest-like vegetation (Tp1), moderate vegetation with intensive (Tp2) and less intensive (Tp3) under-stand cultivation, and sparse vegetation resembling dryland agriculture (Tp4). Vegetation condition was analyzed based on satellite derived NDVI index and field observation. Sentinel satellite images for 2015 and 2019, with a resolution of 10x10 m was used. Field data collection was carried out in August 2019. It was made 5 sample plots of 20x20 m for each management type. Vegetation data with diameter (D) ≥ 20 cm, 10 cm ≤D< 20 cm, 2 cm ≤D< 10 cm and D< 2 cm were collected from plots of 20x20 m, subplots 10x10 m, 5x5 m and 2x2 m, respectively. Soil samples were taken diagonally on a 20x20 m plot, at a depth of 0-5 cm, 5-10 cm, 10-20 cm and 20-30 cm. The results showed that the NDVI derived vegetation index for 2015 and 2019 images showed different patterns for the four types of management. The number of species for Tp1, Tp2, Tp3 and Tp4 were 9, 15, 9 and 8 species, respectively. The dominant species are generally from groups of plants providing economic benefits such as avocado (Persea americana), candlenut (Aleurites moluccana), cocoa (Theobroma cacao), coffee (Coffea canephora), jackfruit (Artocarpus heterophyllus), mangosteen (Garcinia mangostana) and guava (Psidium guajava). Soil carbon stocks of the four types of management at a depth of 0-5 cm, 5-10 cm, 10-20 cm and 20-30 cm were18.61-21.04 tons C/ha, 16.56-20.80 tons C/ha, 29.66-34.48 tons C/ha and 27.54 - 33.66 tons C/ha, respectively. The soil carbon stock of denser vegetation is higher than that of medium and sparse vegetation. Therefore, forest management with the community needs to maintain forest-like vegetation.

Forest development following agricultural abandonment concerns extensive areas including the Massif Central region of France where this study was undertaken. This land-use and land-cover change is expected to have effects on biodiversity and ecosystem services, including an increase of carbon sequestration—a major concern in the face of climate change. Nevertheless, uncertainties about carbon stock changes during successions are remaining, especially as to the total stock and the contribution of the different carbon pools. Our work contributes to this field by studying carbon stocks in multiple plots of different successional stages. We measured and estimated carbon stocks in aboveground and belowground vegetation, deadwood, litter and superficial soil, and surveyed plant communities and plot conditions (slope, aspect, soil characteristics). The average total carbon stock increased along the succession from 70.60 at stage 0 to 314.19 tC ha−1 at stage 5. However, the total carbon stocks at the young forest stage (abandoned for 74 years maximum) and the older forest stage (forested for at least 74 years) were not significantly different, and probably reflected strong local heterogeneity in the older forest stage. An increase of the carbon stock was found in all pools, except the soil pool that did not vary significantly between the successional stages. The aboveground carbon stock was found strongly related to the woody species cover, especially the macrophanerophyte cover. This case study supports the view that the succession dynamics of former agricultural plots participates in carbon sequestration, sometimes with great local variations.

The present study was conducted in tropical and sub-tropical forests of Mizoram, Northeast India. A total of 49 species belonging to 40 genera and 26 families were recorded in the tropical forest (TF). Whereas, in the subtropical forest (STF), 47 species belonging to 42 genera and 28 families were recorded. As per Importance Value Index (IVI), the most dominant species in TF were : Castanopsis tribuloides (47.67), Schima wallichii (40.71), Aporosa octandra (20.96) and Wendlandia budleioides (17.79). Whereas, the species such as Ilex godajam (41.42), Saprosma ternatum (32.74) and Diospyros racemosa (31.34) were the most dominant species in STF. The total tree density and basal area were 1610 individuals ha-1 and 25.016 m2 ha-1 in TF and 1380 individuals ha-1 and 24.20 m2 ha-1 respectively in STF. The diversity indices such as Shannon’s diversity index (H′), Simpson’s dominance index (CD), Margalef richness index (d), and Pielou’s evenness index (J) ranged from 2.93-3.16, 0.91-0.94, 7.82-8.15, 0.76-0.81 in both the forests. The total tree biomass was 178 Mg ha-1 in TF and 144 Mg ha-1 in STF. Similarly, the total carbon stock in TF was 85 Mg C ha-1 and 68 Mg C ha-1 in STF. Such information on these forests can serve as a valuable tool for improving our capacity to enhance biodiversity conservation efforts and management of tropical forests for their sustainable use in the future.

Mangrove forest in Sambas Regency is experiencing several pressures, both naturally and due to land use conversion into settlements, ponds and others. This study aims to analyze the structure of the mangrove community and the existing condition of mangrove forest in Malek Village, Sambas Regency. The research was conducted through vegetation analysis and a remote sensing approach. Estimation of carbon stock was done by using available allometric equations. Remote sensing data used in this study was from Sentinel-2 MSI image. The data was used to obtain information of the area and distribution of mangrove species. Results showed that there were two dominant true mangrove species at the site, namely Avicennia marina (IVI = 212.80) and Bruguiera gymnorrhiza (IVI = 187.20). Based on the results of the analysis, the area of mangrove in the location is 368.41 ha, with a dense category of 63.25%, medium 27.55%, and sparse 9.19%. The estimated value of above ground carbon stock of mangrove vegetation ranges from 23.09 ± 2.30 to 49.23 ± 2.59 Mg C ha-1. The mangrove forest area in Malek Village has good potential, it can be assessed from the density of mangroves, area, the thickness of mangroves, minimum damage, and potential carbon stocks stored.Indonesian title: Struktur komunitas dan potensi cadangan karbon di kawasan hutan mangrove Desa Malek, Kecamatan Paloh, Kabupaten Sambas, Indonesia

BackgroundCurrent theories on biodiversity-carbon sequestration relationship describe biodiversity as an important factor influencing carbon storage, either through complementarity effect or by mass ratio effect. So far, the expected form of biodiversity-carbon relationships in tropical ecosystems has not been known with certainty. Therefore, we explored the relationship between aboveground carbon stock and different biodiversity measurement indices (i.e., species richness, species diversity, species evenness, and functional diversity) in different land cover types of Eastern Ethiopia. A total of 48 plots were established using stratified random sampling. Vegetation parameters such as diameter at breast height, diameter at stump height, tree height, and species type were recorded.ResultsWe found that the average aboveground carbon stock of the study area is 147.6 ± 17.2 t ha−1 (mean, SE) across land cover types. Species richness, Shannon index, and functional diversity together explained 73.5%, 61.4%, 58.9%, and 52.0% of the variation in aboveground carbon storage in woodland, riparian forest, bushland, and farmland, respectively. Functional diversity was a significant predictor explaining the total aboveground carbon stocks (26.7%) across the land cover types. The effects of biodiversity on aboveground carbon storage were mediated by functional diversity and presence and dominance of species. This shows that both the selection effects and the niche complementarity are important for carbon storage. However, the impact of functional diversity effects (niche complementarity) was higher than that of functional dominance effects (selection effects).ConclusionsImplementation of protected area-based ecosystem conservation practices in the country seems feasible to mitigate climate change and Reducing Emissions from Deforestation and Forest Degradation (REDD+) programme should emphasize on biodiversity conservation.

Quantifying tree carbon stock in historically conserved Seminary Hills urban forest of Nagpur, India

Achieving carbon neutrality is crucial for urban ecosystems. Forests growing near cities largely determine the state of the environment in urban areas. The aim of the present research is to assess the carbon productivity dynamics in forests near Krasnoyarsk (a large industrial center) over a 50-year period in terms of carbon sequestration and conservation. The study was based on forest inventory conducted in Karaul'noe Forestry in 1972, 1982, and 2002 and forest inventory covering six forest compartments in 2022. The forest covers 3980 ha and consists of 52 forest compartments. The analysis was based on the assessment of carbon productivity dynamics and followed four levels of principles: forestry, structure, forest compartment, and forest stand. The research was based on forest fund dynamics, analyzing methods, long-term forest inventory, assessing carbon stock, and growing stock dynamics. Pine is the dominant forest-forming species that absorbs the most carbon in the study area. Pine is long-lived, covers a vast area, and has the highest carbon sequestration potential. At the forest structure level, the predominant carbon pools are mid-late successional and late successional stands dominated by pine, birch, and aspen. Forest compartment-level analysis revealed three trends in carbon sequestration: carbon balance, a decrease in carbon sequestration, and an increase in carbon sequestration. Notably, the prevailing trend is determined by changes in carbon sequestration by dominant forest-forming species (pine). Forest stand-level analysis showed that stands have become more and more uneven-aged. About 65% of total carbon stock is concentrated in mid successional, mid-late successional and late-successional stands, and 35% in young stands. The carbon sequestration rate decreases in forests with age. However, pine forests increase biological productivity and continue to successfully sequester carbon. Deciduous forests have lost their carbon sequestration potential, and the area they occupy is currently decreasing in the study area. The development of the young generation in pine stands suggests that the carbon sequestration potential in forests growing near the city will not decrease and may even increase due to climate change. Doi: 10.28991/CEJ-2023-09-09-08 Full Text: PDF

This study targets to assign the total carbon stock of Ashaavieen Nature Reserve, Msallata, Libya, as-sisting its potential carbon market value based on different global market sources. Northern and Southern sites were adopted representing the dominant tree species; (Pinus halepensis, Ziziphus lotus, and Ceratonia siliqua). The samples were conducted across the summer and winter of 2020 to get an annual average. These samples were classified into leaves, stems, bark (aboveground), and roots (be-lowground). The soil samples were collected at 0-10 cm, 10-20 cm, and 20-30 cm depth. Organic car-bon content was assessed based on the Loss on Ignition method (LOI). The results have shown that the bark has recorded the highest carbon content rate, followed by the stem, leaf, and root. Also, the carbon in soil samples has a direct relationship with depth in the order of (0-10 cm) > (10-20 cm) > (20-30 cm). Total carbon stock was 870.47 (t/ha/yr) and 1858.21 (t/ha/yr) in Northern and Southern sites. Total tree coverage of the study area was estimated at 91.26 hectares, while the potential carbon market value ranged from 0.72 t0 32.09 million USD.

This study indicates significant species diversity with variability in growth parameters and showed carbon stock potential of dominant trees species across the University of Karachi campus. The mean diameter at breast height (DBH) (93.48 ± 13.53 cm) of Tamarindus indica L. is over twice as Eucalyptus camaldulensis Dehnh and the mean BA (Basal Area) (6996.80 ± 2138.66 cm2 ) incredibly larger than all others, suggesting trees with much greater DBHs and total volume of wood. The mean DBH of E. camaldulensis (35.92 ± 17.10 cm) and Ficus religiosa L. (36.795 ± 8.83 cm) have the next higher DBH, thus having relatively high mean BAs (1241.71 and 1118.97 cm2 correspondingly). E. camaldulensis, Melia azedarach L., Guaiacum officinale L. and T. indica consistently register relatively larger Total Biomass (TB), carbon stock and CO₂ equivalent values. While Conocarpus erectus L., F. religiosa and Mangifera indica L. have much lower values for these measures reflecting their less contribution to the overall biomass and carbon stock. It was observed the total amount of 1657.355 tons of CO2 is heavily dominated by sampled species. Species diversity analysis revealed low species richness and evenness, with a Shannon index of 1.602, Shannon equitability of 0.72 and a Simpson index of 0.7692, suggesting dominance by a few species.

최근 자연성지에 대한 관심이 증대되고 있다. 자연성지란 특정 민족이나 공동체에게 특별한 영적 중요성을 갖는 육상 또는 해상의 구역으로서 정의된다. 본 연구는 최근 이슈화되고 있는 자연성지에 대한 개념과 가치, 관리원칙에 대하여 이론적으로 고찰하였다. 또한, 자연성지의 가치를 적용 가능한 국내 천연기념물 식물의 현황을 분석하고 그 특성을 살펴보았다. 분석결과 국내 천연기념물 식물 중 63건이 이에 해당되었으며, 생물다양성, 문화성, 경관 및 미적 가치와 함께 관광자원으로써의 가치를 지니고 있었다. 이는 자연성지의 가치와 일치하는 것이었으며, 향후 우리나라 자연성지 등재 작업에 기초자료로 제공하고자 한다. 본 논문은 국제적으로 중요성이 대두되고 있는 자연성지를 국내 천연기념물 식물 측면에서 재조명함으로써 어떻게 관리하고 보전해야 하는지 보여주었다는데 의의를 지니며, 향후 보다 구체적이고 실증적인 추가 연구가 필요하다. Recently, there has been a increasing interest in Sacred natural sites. Sacred natural sites areas defined as "areas of land or water having special spiritual significance to a specific ethnicity or community. This research studies theoretically about the concept and value, the management principle of Sacred natural sites. In addition, status of the domestic natural monument plants that can applicate the values of the Sacred natural sites were analyzed and its characteristics were scanned. In analysis, 63 natural monument plants could be corresponded also they have biodiversity value, landscape and aesthetic values, cultural values, tour resources values. These are same as the general values of sacred natural sites. This research will contribute as a basis to register of sacred natural sites in korea. This study has the importance that plant of natural monuments of view point that natural sacred sites out of the importance internationally conditions. A follow-up research is required to ascertain natural sacred sites would getting concertely and practical case study.

PDF HTML阅读 XML下载 导出引用 引用提醒 三沙湾浮游动物生态类群演替特征 DOI: 10.5846/stxb201207241050 作者: 作者单位: 厦门大学海洋学系,厦门大学海洋学系 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金项目(40776077); 国家重点基础研究发展计划(973计划)项目(2010CB428705) Seasonal succession of zooplankton in Sansha Bay, Fujian Author: Affiliation: Department of Oceanography,Xiamen University,Department of Oceanography,Xiamen University Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:根据2010年6月-2011年5月三沙湾海域5个航次海洋综合调查资料,对三沙湾浮游动物种群特征进行分析,并与我国不同纬度海湾生态类群结构进行比较。探讨三沙湾海域浮游动物生态类群季节变化特征及其受水团季节变化的影响。研究结果表明:4月和5月三沙湾海域主要受到浙闽沿岸流影响,生物多样性H'指数分别为2.03和2.02;种类数分别仅为17种和19种,明显低于6月、8月和10月;浮游动物生态类群以暖温带近海种为主;优势种种类数少,单一优势种优势性明显,4月中华哲水蚤丰度占浮游动物总丰度的65.03%;群落结构特征与同期我国长江口浮游动物区系特征相似。6月三沙湾海域受到浙闽沿岸流和台湾暖流共同影响,同时因闽北雨季导致大量大陆径流汇入,使得该月浮游动物种群结构复杂,生物多样性指数和种类数全年最高,为3.12和45种,与5月相比,种类更替明显,物种更替率为69.39%;亚热带近海种丰度百分比最高(73.03%),亚热带外海种种类数百分比次之(48.89%),是海域浮游动物生态类群由以暖温带近海种为主向以亚热带外海种为主的过渡时期。8月和10月浙闽沿岸流消失,三沙湾海域受台湾暖流控制,海水温度和盐度升高,生物多样性指数和种类数均略低于6月;生态类群结构以亚热带外海种为主;优势种特征表现为种类数多而各个优势种丰度较低;浮游动物群落结构特征与南海北部海域浮游动物组成极为相似。 Abstract:The semi-enclosed coastal waters of northeastern Fujian (Sansha Bay) are an important natural spawning ground for the large yellow croaker (Larimichthys crocea) in China. The yellow croaker is an important species for Chinese fisheries, and depends on a healthy zooplankton population. In this study, the seasonal succession of zooplankton in Sansha Bay was described and its relationship to the currents from the open sea was analyzed. Sampling was carried out in June, August and October 2010, and in April and May 2011. Seasonal changes in the zooplankton community structure were strongly influenced by the coastal current and the Taiwan Warm Current as well as an influx of freshwater from the mainland. A total number of 71 species of zooplankton were identified, which consisted of 19.72% warm temperate nearshore species, 30.99% subtropical nearshore species and 47.89% subtropical offshore species. In April and May, influenced by the coastal current, the water temperature and salinity were both low, which induced a bottoming-out in the diversity index (H') (2.03 and 2.02, respectively) as well as the number of species (17 and 19, respectively). The zooplankton fauna was exclusively of the warm temperate nearshore type, especially in April. Both the species number and abundance of warm temperate nearshore species were high (76.47% and 96.28%, respectively). Calanus sinicus, one of only a few dominant species in April, comprised 65.03% of the total abundance of all zooplankton. The simple structure of the zooplankton fauna comprised only a few species and with a high contribution made by each of the dominant species in this period was similar to characteristics noted in the warm-temperate water area north of the Yangtze River. During the June rainy season, a high diversity index (3.12) and species number (45) were recorded owing to the impact of the coastal current, the Taiwan Warm Current and a high volume of fresh water input. These were the most influential factors on the complex taxonomic structure and eco-group composition of the zooplankton fauna. June also displayed the highest species turnover rate, reaching up to 69.39%, compared with other months. The dominate eco-group type changed rapidly from warm temperate and subtropical nearshore species to subtropical offshore species in this month. Subtropical nearshore species comprised the highest proportion of species (73.03%). Subtropical offshore species contributed 48.89% of the overall abundance. After the rainy season, in August and October, there was a slight decrease in diversity index and species number, and the water temperature and salinity increased sharply owing to the strong affect of the Taiwan Warm Current. The zooplankton community was dominated (in terms of species numbers and density) by highly diversified subtropical offshore species. Its proportion of species number and abundance in August were 57.14% and 59.94%, respectively, and species number proportion was 57.58% in October. The community structure had many more dominant species than in April and May, of which the vast majority were subtropical offshore species. The characteristics of the zooplankton community in Sansha Bay were similar to those in the subtropical water areas of the South China Sea. 参考文献 相似文献 引证文献