搜索结果: 151-165 共查到“知识库 生态学”相关记录1897条 . 查询时间(2.718 秒)
Causes and consequences of nutrient over-enrichment of coastal waters
nutrient over-enrichment coastal waters
2016/5/18
Causes and consequences of nutrient over-enrichment of coastal waters.
Chesapeake Bay eutrophication: scientific understanding, ecosystem restoration and challenges for agriculture
ecosystem restoration challenges
2016/5/18
Chesapeake Bay eutrophication: scientific understanding, ecosystem restoration and challenges for agriculture.
Coastal eutrophication and agriculture:contributions and solutions
Coastal eutrophication contributions solutions
2016/5/18
Coastal eutrophication and agriculture:contributions and solutions.
The sustainability of coa tal Louisiana is crit-
ical to the nation. It is the location of a
large part of the nation' oil and ga indu -
try and its largest port complex. It pro-
vides vital habit...
Restoration of the Mississippi Delta: Lessons from Hurricanes Katrina and Rita
climate change Mississippi Deltaic Plain
2016/5/18
Hurricanes Katrina and Rita showed the vulnerability of coastal communities and how human
activities that caused deterioration of the Mississippi Deltaic Plain (MDP) exacerbated this
vulnerability. ...
杜加依林建群种胡杨（Populus euphratica）的水分再分配现象已被广泛认知，但该现象对其伴生种多样性和生态位宽度的影响仍不清楚。基于120个样方的调查数据，通过分析比较2010年6、8、10月胡杨林冠下（林冠群落）与非胡杨林下（对照群落）在群落数量特征、物种多样性和生态位宽度上的差别，以探明水分再分配和物种多样性间的关系。结果表明：（1）林冠灌木和草本群落的郁闭度、株高和多度在6、8、...
在生态环境脆弱的半干旱区,实施农业开发的核心目的是发展区域经济并维持生态安全,而土地资源生态安全是实现半干旱区可持续发展的重要前提.针对综合指数法、模糊综合法无法同时兼顾生态安全评价指标的模糊性与随机性,以及特尔菲法、层次分析法确定指标权重时主观性过强的问题,本研究将正态云模型与熵权法引入半干旱区农业开发土地资源生态安全评价,并以位于半干旱区的孙家滩国家农业科技园为例,对农业开发前后的土地资源生态...
Soil management practice effect on water balance of a dryland soil during fallow period on the Loess Plateau of China
deep percolation fallow efficiency modelling
2016/2/22
To understand the mechanisms affecting water balance partitioning during fallow on drylands could improve the fallow management practices in arable land ecosystems. A three-year field experiment was c...
An approach to mapping the potential of cultural agroecosystem services
cultural services cultural services potential ecosystem services
2016/2/22
A system for evaluating outdoor recreation as a cultural agroecosystem service is presented. Every agroecosystem presumably has the potential for providing some kind of outdoor recreation. Two approac...
The impact of impervious surfaces on ecohydrology and health in urban ecosystems of Banská Bystrica (Slovakia)
built environment runoff soil sealing
2016/2/22
The risks of accelerated runoff and its larger amounts brought by urbanisation include increased flood flows and pollution of downstream ecosystems. One of the most significant permanent effect of urb...
Origins of diverse feeding ecologies within Conus, a genus of venomous marine gastropods
Gastropoda Conus molecular phylogeny
2015/12/17
Specialized predators on polychaetes, fishes, hemichordates or other molluscs, members of the predominantly
tropical gastropod genus Conus diversified rapidly during the Miocene to consti...
In the market for minke whales
minke whales ecology
2015/12/17
The capture–recapture technique is a mainstay of ecology. This principle
has been applied with individual genotyping to estimate how many
accidentally killed minke whales reach the markets of Sout...
Reconstructing past ecological networks: the reconfiguration of seed‑dispersal interactions after megafaunal extinction
ecological networks Frugivory modularity mutualisms Pantanal rewilding
2015/11/13
the late Quaternary megafaunal extinction
impacted ecological communities worldwide, and affected
key ecological processes such as seed dispersal. the traits
of several species of large-seeded p...
太湖湖心区的痕量金属历史沉积过程研究
太湖 湖心区 重金属 沉积过程
2015/11/5
以太湖湖心区的沉积物为研究对象，解析了湖心区痕量金属的沉积通量年变化，探明了湖心区痕量金属的历史沉积情况．结果表明：湖心
区各样点沉积物的沉积速率从 １９５０ 年以前的（０．０３２±０．０２３） ｇ·ｃｍ
－·２
ａ
－１缓慢递增到 １９８０ 前后的（０．０７６±０．０３０） ｇ·ｃｍ
－·２
ａ
－１
，１９８０ 年后突增明
显，在 ２０００ 年后达到（０．１８５±０．１３２）...
Two ecological perspectives:Gibson vs.Shaw and Turvey.