搜索结果: 1-15 共查到“species richness”相关记录19条 . 查询时间(0.078 秒)
Understory Plant Abundance Is More Important than Species Richness in Explaining Soil Nutrient Variation Following Afforestation on the Eastern Loess Plateau, China
afforestation soil organic carbon total nitrogen total phosphorus understory vegetation biomass
2023/12/1
Afforestation plays an important role in controlling soil erosion and nutrient loss on the Loess Plateau in China. However, previous studies on soil nutrient changes have mainly focused on the effects...
Differential diameter-size effects of forest management on tree species richness and community structure: implications for conservation
Differential diameter-size effects tree species richness
2015/11/13
In this paper we tested the hypothesis that logging effects in the adult tree
community reverberate upon the regeneration contingent. We examined the differences on
the tree community between forest...
Size-dependent species richness:trends within plant communities and across latitude
Community ecology plant size species packing species richness
2015/8/27
We examine how species richness and species-specific plant density (number of species and number of individuals per species, respectively) vary within community size frequency distributions and across...
Variation in demersal fish species richness in the oceans surrounding New Zealand:an analysis using boosted regression trees
Demersal fish Species richness Boosted regression trees Statistical model
2015/8/21
We analysed relationships between demersal fish species richness, environment and trawl characteristics using an extensive collection of trawl data from the oceans around New Zealand. Analyses were ca...
Can clearcuts increase bird species richness in managed forests?
forestry diversity forest conservation rarefaction gaps
2015/3/12
Clearcuts are one of the results of forest management. The aim of this study was to assess the effect of clearcuts on bird communities in a managed forest in Western Poland. I applied the method of po...
INTERANNUAL VARIABILITY OF NDVI AND SPECIES RICHNESS IN KENYA
Interannual AVHRR-NDVI spatial scale birds mammals plants species richness Kenya
2015/2/4
A central task in community ecology is to determine biophysical controls of species richness patterns. Most multivariate
models relating environmental characteristics to species richness were develop...
Taxon- and vector-specific variation in species richness and abundance during the transport stage of biological invasions
Taxon- and vector-specific variation species richness abundance the transport stage of biological invasions
2014/4/2
Recent empirical and statistical evidence suggest that propagule pressure (i.e., number of individuals introduced per event, and the number and frequency of events) and colonization pressure (i.e., nu...
Mollusk Species Richness on the Rocky Shores of the State of Guerrero, Mexico, as Affected by Rains and Their Geographical Distribution
Rocky Shore Species Richness Geographic Distribution Rain Effects Mollusks
2013/3/8
Natural processes in ecosystems shows significant variations in species richness with regular cycles that can be altered by natural or anthropogenic activities; the present research was in order to un...
Effect of Recreation on the Species Richness and Diversity of Rotifers in Ponds
Indicators Rotifers Community Trophic Status
2013/3/19
Planktonic rotifers were examined from April to October 2007 in two ponds created by sand extraction: Hubertus III (infrequently used for recreation)—pond I and Stawiki (commonly used for recreation)—...
On some Bayesian nonparametric estimators for species richness under two-parameter Poisson-Dirichlet priors
Bayesian nonparametric estimators species richness two-parameter Poisson-Dirichlet priors
2010/3/11
We present an alternative approach to the Bayesian nonparametric analysis of conditional
species richness under two-parameter Poisson Dirichlet priors. We rely on a known characteri-
zation by delet...
Seed Plant Species Pools：the Development of Species Richness in Eastern Asia and North America
North America Eastern Asia Species Richness Seed Plant
2009/9/23
Great species richness in eastern Asia is the effect of a long history with low extinction and speciati0n
rates,while great richness in northwestern North Am erica is due to recent rapid speciati0n
...
Spatial Patterns of Species Richness： A Hierarchical Perspective
geographic patterns Species Richness Spatial Patterns
2009/9/23
This paper examines several major geographic patterns of species richness and related hy—
potheses of mechanisms．These species patterns include latitudinal gradient，elevation gradient，
aridity gradi...
Maximum Species Richness： Where Is It？
Maximum Species Richness seed plants tempe rate zones
2009/9/23
W here does maximum species richness exist?
answered based on a large database．We examined
This frequently asked question has never been
about 10 000 species of seed plants in the northern
portion...
Biomass production in experimental grasslands of different species richness during three years of climate warming
Biomass production experimental grasslands species richness climate warming
2010/1/15
Here we report on the single and combined impacts of climate warming and species richness on the biomass production in experimental grassland communities. Projections of a future warmer climate have s...
Effects of climate warming and declining species richness in grassland model ecosystems:acclimation of CO2 fluxes
climate warming declining species richness grassland model ecosystems CO2 fluxes
2010/1/14
To study the effects of warming and declining species richness on the carbon balance of grassland communities, model ecosystems containing one, three or nine species were exposed to ambient and elevat...