搜索结果: 46-60 共查到“理学 communities”相关记录121条 . 查询时间(0.045 秒)
A sampling theory for asymmetric communities
sampling theory asymmetric communities
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2010/11/15
We introduce the first analytical model of asymmetric community dynamics to yield Hubbell's neutral theory in the limit of functional equivalence among all species. Our focus centers on an asymmetric ...
Carbon cycling within epilithic biofilm communities across a nutrient gradient of headwater streams
Carbon cycling within epilithic biofilm communities across a nutrient gradient headwater streams
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2014/4/17
Primary production (PP), nutrient uptake, and carbon (C) cycling within epilithic biofilm communities were assessed in four headwater streams in the Arkansas Ozarks, U.S.A., representing a hundred-fol...
Temporal shift in nutrient input to cold-seep food webs revealed by stable-isotope signatures of associated communities
cold-seep food webs Temporal shift
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2014/4/17
A pattern of succession has been demonstrated at Gulf of Mexico cold seeps proceeding from a high-biomass
endemic community dominated by grazers to a diverse community of endemic and nonendemic speci...
Reorganization of algal communities in the Lake of the Woods (Ontario, Canada) in response to turn-of-the-century damming and recent warming
algal communities recent warming
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2014/4/17
Paleolimnological approaches were used to assess the ecological and environmental implications of diatom
assemblage compositional changes recorded over the last , 200 yr from four sites in the Lake o...
High incidence of invertebrate–chemoautotroph symbioses in benthic communities of the New Zealand fjords
High incidence invertebrate–chemoautotroph symbioses benthic communities the New Zealand fjords
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2014/4/16
In the New Zealand fjords, hydrogen sulfide production from decomposing forest litter is used by chemoautotrophs to fix CO2[aq]and support benthic food webs. We used quantitative surveys and stable is...
Dynamics of organic-aggregate–associated bacterial communities and related environmental factors in Lake Taihu, a large eutrophic shallow lake in China
organic-aggregate–associated aihu a large eutrophic shallow lake
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2014/4/16
To investigate the spatial and temporal variations of organic-aggregate–associated bacterial communities
(OABC), a 25-month observation was conducted at two contrasting sites (Meiliang Bay and the la...
Predictive Analysis for Social Diffusion: The Role of Network Communities
Social diffusion social networks prediction empirical analysis
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2010/4/7
The diffusion of information and behaviors over social networks is of considerable interest in research fields ranging from sociology to computer science and application domains such as marketing, fin...
On the Characteristics of Housing Spatial Structure and Location Selection of Residential Communities: A Case Study of Wuhan City
Residential communities Housing spatial structure Residential location selection
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2009/12/3
With the deepening of the housing system reform in China, the residential spatial structure has graduallyassumed a complex shape along with its tremendous changes in Wuhan city. It is very crucial and...
Extreme weather events alter planktonic communities in boreal lakes
Extreme weather alter planktonic communities boreal lakes
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2014/4/17
Climate warming has been shown to increase the frequency of extreme weather effects on small lakes by increasing the variability of terrigenic inputs and surface water temperatures. We hypothesized th...
Animal Communities in Icelandic Rivers in Relation to Catchment Characteristics and Water Chemistry
Animal Communities Icelandic Rivers Catchment Characteristics Water Chemistry
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2009/10/23
Catchment areas of Icelandic rivers are mostly barren or with little vegetation
cover in the highlands, but with heathland and mire vegetation in the lowlands.
Chemical composition and nutrient avai...
Uranium exploration,non-governmental organizations,and local communities.The origin,anatomy,and consequences of a new challenge in Finland
uranium exploration environment non-governmental organizations public awareness
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2009/10/21
The advent of global warming has returned nuclear power to the agenda. Many countries, including Finland, have decided to construct more nuclear power plants. They will need uranium, and its price is ...
Relationships between size-fractionated indoor and outdoor trace elements at four retirement communities in southern California
size-fractionated indoor outdoor trace elements four retirement communities southern California
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2009/7/22
Indoor and outdoor water soluble trace elements (TEs) were analyzed on quasi-ultrafine (UF), accumulation, and coarse PM filter samples collected at four retirement communities, three located in the S...
Thresholds of gross primary production for the metabolic balance of marine planktonic communities
Thresholds of gross primary production metabolic balance marine planktonic communities
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2014/4/18
The notion that less productive marine planktonic communities tend to be heterotrophic was tested by synthesizing reported estimates of the relationships between the net community production or commun...
The effect of temperature on the coupling between phosphorus and growth in lacustrine bacterioplankton communities
The effect of temperature coupling between phosphorus growth in lacustrine bacterioplankton communities
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2014/4/18
Phosphorus (P) routinely limits microbial growth in freshwater ecosystems. The growth rate hypothesis (GRH) relates growth to biomass P content mechanistically through changes in ribosomal ribonucleic...
Bacterial Communities Developing during Composting Processes in Animal Manure Treatment Facilities
16S rRNA Gene Animal Manure Bacteria Composting PCR-DGGE
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2016/4/29
We analyzed succession of the bacterial communities during composting of animal manure in three individual facilities. Polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis (DGGE...