Results 21 to 30 of about 20,560 (196)

Study on Geochemistry of Nutrient and Nutrient Criteria in Jiulong Estuary [PDF]

open access: yes, 2015
由于大量的人为输入河口的营养盐(特别是氮和磷),近海富营养化区域逐渐扩大。河口和近海水体的富营养化已经引起了全世界的广泛关注。水体富营养化对环境造成很多影响,比如水质恶化、赤潮爆发、生态系统结构改变、低氧和死亡区的出现以及大量的经济损失。研究河口营养盐循环,并建立合理的营养盐基准值保护河口及沿海水体的措施刻不容缓。 本研究融合多学科知识,对不同季节的九龙江河口地区进行了多个航次的现场采样和同位素培养,运用GIS技术并收集整理历史数据,揭示了九龙江河口营养盐时空变化、内部迁移转化过程以及水体营养盐浓度 ...
黄铮
core  

Strengthening community‐based fisheries monitoring programs with Indigenous perspectives

open access: yesConservation Biology, EarlyView.
Abstract Community‐based monitoring (CBM) programs are increasingly recognized as essential for adaptive environmental stewardship. Yet, the CBM literature often highlights successful cases and privileges evaluations by external experts over those of community members themselves.
Kanwaljeet Dewan   +2 more
wiley   +1 more source

Metal Bioaccumulation and its Mechanisms in Oysters of Jiulong River Estuary Impacted by Wastewater Discharge [PDF]

open access: yes, 2016
重金属污染在河口环境中普遍存在,导致生物资源的衰退,影响生态系统的功能。本研究在九龙江口受排污影响水域设定3个站位,以香港牡蛎为研究对象,通过48d的移植实验,研究在高度动态的受污染河口中,重金属的生物累积和亚细胞分布。实验中,同步采集水样,测定溶解态、颗粒态重金属浓度,研究重金属的颗粒分配行为。同时运用梯度薄膜渗透(DGT)技术测定的有效态金属浓度进行对比。 通过测定重金属的溶解态及颗粒态浓度,发现Cr、Ni、Cu、Zn是所研究水域主要的重金属污染物。溶解态浓度平均值分别为9.39μgCr/L,34 ...
周炜韬
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非人灵长类动物感染芽囊原虫的研究进展

open access: yes野生动物学报, 2019
芽囊原虫(Blastocystis spp.)病是一种人兽共患寄生虫病,广泛分布于世界各地。曾经长期被认为是一种对人体无害的酵母,近年来大量证据表明,芽囊原虫是一类可寄生在人和灵长类等多种动物的肠道内可致病的原虫。随着研究的深入,非人灵长类动物芽囊原虫病逐渐引起人们的关注,非人灵长类动物和人类具有相似的基因背景和表型特征而成为研究人类疾病中的理想动物模型。本文从流行病学、基因分型等方面总结了国内外芽囊原虫在非人灵长类动物中感染情况和不同国家之间基因型差异的研究进展 ...
李廷翠 普丽花 李红霞
doaj  

Differences in characteristics between naturalized threatened plants and other threatened plants

open access: yesConservation Biology, EarlyView.
Abstract Many non‐native plant species introduced by humans have become naturalized. At the same time many species are threatened in their native range. However, the number of plant species threatened in their native range that are naturalized elsewhere remains unknown.
Weihan Zhao   +10 more
wiley   +1 more source

Ecological study on plankton and water quality bioassessment of the Jiulong River Estuary [PDF]

open access: yes, 2015
本文以环保公益性行业科研专项“入海河口区水质标准和水环境质量评价方法研究(NO:201309007)”2013年9月~2014年4月4个季节的调查数据为基础,对九龙江口浮游生物的种类组成、时空分布、优势种、环境影响因素等进行了研究;基于环境因素和地理水文概况进行了区域划分,探讨了不同分区浮游生物的群落结构特点并对其水质进行了生物学评价。 主要的研究成果如下: 1、九龙江口浮游植物的种类组成和数量变化 本次调查共鉴定浮游植物150种(含变种和变型),隶属于5门63属,其中以硅藻占主导地位 ...
吴白洁
core  

Functional homogenization of terrestrial mammals outside protected areas in the Hengduan Mountains, China

open access: yesConservation Biology, EarlyView.
Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li   +8 more
wiley   +1 more source

甘肃的动物资源

open access: yes野生动物学报, 1986
动物,即虫鱼鸟兽乃至人类都是自然生态系绕的重要组成部分。人类不仅源出于动物世界,并且在进化的过程中依赖动物界所提供的营养 (蛋白质) 促进了人类的发展,到今天人类发展到上可皋翔于太空,可驰骋在辽阔的大地上,下可到深海探宝,“主宰自然的时代”随着人类的进步,科学技术和工农业的高度发展,人类对于动物资源的依赖程度和影响将相应地急剧增长。人为了使动物界能长久的、最大限度的提供给人们生活和生产所必需的物质财富 ...
张孚允
doaj  

Using incentive payments to promote human–carnivore coexistence

open access: yesConservation Biology, EarlyView.
Abstract For many large carnivores, minimizing the financial burden they impose on local people is critical to their conservation. Incentive‐based programs that provide people with financial benefits for taking pro‐conservation actions or achieving conservation goals are a promising tool for promoting human–carnivore coexistence. Although the number of
Adam Pekor   +9 more
wiley   +1 more source

Rates and Influence Factors of Water Nitrification and Inorganic Nitrogen Uptake in Pearl River Estuary [PDF]

open access: yes, 2016
氮是海洋初级生产力的主要限制因素之一,海洋氮循环过程与碳、磷等其它生源要素的循环紧密联系,影响有机物输出,调控海洋生物泵效率和大气二氧化碳水平,在海洋生物地球化学循环过程中扮演极其重要的角色。硝化作用和浮游植物吸收是氮循环中的重要过程,大量人为来源活性氮的排放对河口和近海的生物地球化学过程产生了显著影响,并影响了氮营养盐内部转化过程。本研究于2015年7月间,对珠江口的11个站位进行了调查,覆盖了珠江口淡水区域、咸淡水混合区和冲淡水区。 本研究首次应用氮稳定同位素示踪技术 ...
张骁
core  

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