Results 21 to 30 of about 3,874 (209)
Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecological communities are stressed by rapid and complex anthropogenic changes, threatening the persistence of biotic interactions and ecosystem functioning. Plant–pollinator communities, for instance, undergo structural transformations as a result of land‐use change ...
Erliang Gao +8 more
wiley +1 more source
Study on latitudinal gradient of species diversity in forest communities [PDF]
森林群落结构和物种多样性的空间分异规律一直是生态学研究的热点问题。近年来,关于森林群落结构的描述与物种多样性的测定方法等研究也都有所发展,但这些研究大多是对森林生态系统的定性描述,而且方法不一,数据之间也缺乏可比性。 群落的组成结构是群落的重要标志,研究群落结构是研究群落物种多样性意义的理论基础,所以从群落组成结构的角度来探讨生物群落的物种多样性具有重要的意义,为进一步深入研究生物多样性功能及确定功能群提供理论基础 ...
孙影
core
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
Ecological Function and Environmental Adaptation Mechanisms of Pelagic Archaea in Typical Areas of China Seas [PDF]
浮游古菌是海洋微型生物的重要组成之一。在真光层以下的深海大洋,海洋泉古菌MarineGroupI(MGI)类群的生物量可占总原核生物量的20%。最近,环境基因组学研究的突破性进展和海洋泉古菌MGI类群纯培养株系的获得揭示出大部分MGI类群都是氨氧化古菌(Ammonia-OxidizingArchaea,AOA)。由于MGI类群是海洋中数量最为丰富的微型生物之一,其必然在海洋碳、氮循环中起着重要作用,目前AOA已成为环境微生物生态学的研究热点之一 ...
胡安谊
core
Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge +2 more
wiley +1 more source
Primary Production in the East China Sea and the northern South China Sea: distributions and correlations with phytoplankton community structure [PDF]
初级生产过程是海洋生态系统最重要的过程之一,是分析生态系统物质循环和能量流动的基础。对中国海初级生产过程研究,过去主要集中在初级生产力的量级和时空分布方面,缺少对初级生产过程的微观研究以及对初级生产力的调控机制的定量研究。本研究以中国东海和南海北部两个边缘海生态系统为主要研究对象,针对中国亚热带边缘海(东海和南海北部)初级生产力时空变化规律与调控机制,特别是与海洋水体光学特征和浮游植物群落结构的关系等科学问题。采用P-E曲线法和特征光合色素法分别进行初级生产力和浮游植物群落结构的测量 ...
谢聿原
core
Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
Read the free Plain Language Summary for this article on the Journal blog. Abstract Jellyfish blooms are increasing globally in frequency and intensity, introducing complex ecological interactions, yet the mechanisms by which they alter ecosystem structure remain poorly characterized due to a lack of sustained field observations.
Pengpeng Wang +4 more
wiley +1 more source
对东白山(Dongbaishan,DBS)1 hm2森林样地内胸径≥1 cm的木本植物进行统计,初步分析了样地的区系成分、物种组成、群落结构和α多样性.结果表明:样地内共计木本植物48种,隶属23科36属,总计5 493株,以常绿树种为主,共25种,占总优势度的98.18%,重要值的95.22%,总个体数的96.65% ;群落内有明显的优势种、偶见种和部分稀有种,木荷(Schima superba)和马尾松(Pinus massoniana)占显著优势;偶见种和稀有种分别占总物种数的35.42%和20 ...
WANGYunquan(王云泉) +7 more
doaj +1 more source
The impacts of habitat heterogeneity of mangroves on mollusks diversity at Dongzhaigang Bay, Hainan [PDF]
包括软体动物在内的大型底栖动物是红树林生态系统的重要组成部分,几乎在所有的红树林生境类型中都能够发现它们的存在,其在红树林中占据了重要的生态位,通过穴居、取食等活动改变着红树林有机物循环的物理和化学过程,对红树林生态系统的结构和功能的维持具有非常重要的作用,是红树林生态系统中食物网的重要环节。本文选取了海南省东寨港国家级自然保护区内三个不同地点的红树林从空间尺度方面对其中的软体动物分布进行了研究。此外还比较了不同地点的红树植物群落内软体动物分布的特点。 选择了海南东寨港的湾口(塔市)、中部(后排 ...
章慧
core
Linking biochemical properties of particles to particle-attached and free-living bacterial community structure along the particle density gradient from freshwater to open ocean [PDF]
海洋颗粒有机质(particulateorganicmatter,POM)作为初级生产力的承担者,是链接生物泵和微型生物碳泵的重要桥梁,在海洋物质和能量循环中扮演重要角色。海洋颗粒附着(particle-attached,PA)细菌能够寄居在颗粒物上,通过细菌水解酶作用将POM转化成溶解有机质(dissolvedorganicmatter,DOM),在颗粒物周围形成羽流。POM在去除过程中直接为PA细菌提供底物,影响PA细菌群落组成,而颗粒物释放的小分子化合物则影响周围的浮游(free-living ...
肖伟
core +1 more source

