Analysis on the indicator species and ecological groups of pelagic ostracods in the East China Sea

Ecological adaptation and ecological groups of pelagic ostracods were examined in the East China Sea （23°30′-33°00′N, 118°30′ -128°00′E）, in relation to temperature and salinity. The data were collected in four surveys conducted from 1997 to 2000. The density, yield density, or negative exponent models were used to determine the optimal temperature and salinity of water for the thriving growth of pelagic ostracods. Thereafter, ecological groups and potential distribution patterns of pelagic ostracods were determined based on the predicted parameters such as optimal temperature and salinity, consulting the geographic distribution. The analytical results indicate that, among the numerical dominant pelagic ostracods in the East China Sea （ECS）, Euconchoecia aculeata, E. elongata, E. chierchiae, E. maimai, and Cypridina dentata, etc. are offshore subtropical water species. These species are widely distributed in the area, and they can be brought by the warm current to north offshore during spring and winter. The predicated optimal temperature （OT） and optimal salinity （OS） for Paraconchoecia decipiens, P. echinata, P. spini- fera, P. oblonga, Conchoecia magna and Porroeciaporrecta are all greater than 25℃ and 34 separately. These species are mainly distributed in the waters of the Kuroshio, the Taiwan Warm Current, and the Taiwan Strait, and therefore are designated as ocean- ic tropical water species. On the other hand, Pseudoconchoecia concerttrica is considered as offshore subtropical water species based on its geographical distribution although its OT is 19℃. The other species, though their OSs are approximately 34 and with OTs ranging from 20° to 25℃, are considered as offshore subtropical water species because they were found to be widely distributed from the South China Sea to the East China Sea.     

沙蚕科的研究进展

沙蚕科(Nereididae)属环节动物门(Annelida)、多毛纲(Polychaeta)、沙蚕目(Nereidida),为重要的经济多毛类.其含丰富的蛋白质,是鱼、虾、蟹等优质饵料;是优质钓饵,被称为"万能钓饵".其味道鲜美,且具药用价值.随着海水养殖的发展,沙蚕在改良池塘底质,治理环境污染的作用,选择以移养沙蚕为重点的生态养殖越来越发挥明显作用.     

两海洋公益性科研专项经费重点项目启动

日前,"流域一河口区生态安全评价与调控技术研究"、"入海污染物总量控制和减排技术集成与示范"项目在厦门召开项目启动会,这两个项目是国家海洋局和与地方政府海洋管理部门通力合作开展的海洋公益性科研重点项目,由国家海洋局第三海洋研究所牵头,福建省海洋与渔业监测中心、江苏省海洋环境监测预报中心、广西海洋监测预报中心、国家海洋局东海环境监测中心和中国海洋大学、厦门大学等单位参加,项目计划用3年时间完成.     

加强海洋生态保护 建设蛎岈山牡蛎礁海洋特别保护区

海门拥有海岸线12.5千米,海域面积320平方千米,人口101万,是江苏海洋重点县(市)之一。海门具有丰富的海洋渔业资源和滨海旅游资源。蛎岈山牡蛎礁是我国海岸滩涂上稀有的唯一独特的活体牡蛎礁瑰宝。礁体迄今已有1690多     

基于RS和GIS的宁夏灵武市景观生态研究

基于遥感（RS）和地理信息系统（GIS）技术,以中巴资源卫星图像为基本数据源,利用ERDAS Imagine 8．4对图像进行波段组合、优化、增强,然后用hrcview GIS3．2对图像进行解译,最后综合运用景观生态学理论和方法,对典型农牧交错生态脆弱区的灵武市2000～2006年生态景观格局动态变化进行了研究。     

福建兴化湾围填海湿地景观生态影响研究

基于遥感与GIS技术,运用景观生态学的原理与方法,选取景观特征指数,通过历史回顾和类比分析,从景观自然性和景观破碎化两个方面,分析了兴化湾围填海工程对湿地景观生态造成的影响及其生态效应.历史上兴化湾围填海工程造成滩涂湿地景观萎缩、景观自然性急剧下降,斑块面积缩小、斑块隔离程度增大、景观破碎化程度加剧;兴化湾围填海规划的实施,将使得兴化湾湿地景观生态人工化与破碎化的趋势进一步加剧,其最终后果将可能导致兴化湾生物多样性下降、生态服务功能严重衰退.     

闽东沿岸2004～2006年浮游植物生态特征研究

根据闽东海洋环境监测中心2004年-2006年阂东沿岸生态调查的资料,分析和研究了闽东沿岸浮游植物的生态特征．共鉴定出浮游植物的种类3个门39属共134种,其中硅藻门的种类占总种数的80％,为该调查海域主要门类．主要优势种是中肋骨条藻（Skeletonema costatum）、旋链角毛藻（Chaetoceros curvisetus）、尖刺拟菱形藻（Pseudo—nitzschia pungens）和丹麦细柱藻（Leptocylindrus danicus）等．浮游植物的丰度分布,呈现由调查海域东北侧向西南侧、由近岸向远岸减少的空间特征,夏季高、春季低的季节变化特点,并且有逐年减少的年际变化趋势．本调查海域浮游植物多样性指数较高,群落较稳定．     

“环湾保护、拥湾发展”战略背景下的胶州湾及邻近海域生态环境问题研究

文章分析了胶州湾及邻近海域的生态环境问题,并提出建立胶州湾及邻近海域生态监控区的设想,进一步提出相应的对策建议。     

Application of matter-element model in soil nutrient evaluation of ecological fragile region

On the basis of the soil environment investigation in Da'an City, Jilin Province, China, 40 soil samples from main land use types were obtained and tested by standard method. Soil organic matter (SOM), total N (TN), total P (TP), total K (TK), available N (AN), available P (AP) and available K (AK) were chosen as the evaluation factors. A regional soil nutrient evaluation model was developed based on the matter-element model. The results show that the soil samples with nutrient grade Ⅱ-Ⅴ respectively account for 10%, 30%, 32.5% and 27.5%, and those with grade Ⅳ and Ⅴ account for 60% in all samples. The relationship between soil nutrients and land types indicates that the nutrients of farmland are relatively good, with 41.7% of soil samples with the nutrient grade Ⅳ and Ⅴ. The nutrients of saline-alkali land and sandy land are the worst, with 100% of soil samples with the nutrient grade Ⅳ and Ⅴ. And the ratios of soil samples grade Ⅳ and Ⅴ in grassland and wasteland are respectively 62.5 % and 54.55%. Generally speaking, the soil nutrients status in Da'an City is poor, 60% of soil samples are in poor and extremely poor conditions, indicating that the soil has been severely eroded. Being a relatively superior evaluation method with more accurate resuits and spatial distribution consistency, matter-element analysis is more suitable for regional soil nutrient evaluation than previous models.     

增强节约意识 坚守耕地红线

党的第十七届三中全会通过了《中共中央关于推进农村改革发展若干重大问题的决定》。该决定提出的农村改革发展基本目标任务,涉及农村经济建设、政治建设、社会建设、文化建设和生态文明建设各个方面,是我们党对农村改革发展和社会主义新农村建设构想的进一步细化,为8亿农民提出了具体而明确的奋斗目标。