Results 11 to 20 of about 234,695 (315)

SPECIES: An R Package for Species Richness Estimation [PDF]

Journal of Statistical Software, 2011
We introduce an R package SPECIES for species richness or diversity estimation. This package provides simple R functions to compute point and confidence interval estimates of species number from a few nonparametric and semi-parametric methods.
Ji-Ping Wang
doaj   +1 more source

Species richness-environment relationships of European arthropods at two spatial grains: habitats and countries [PDF]

, 2012
We study how species richness of arthropods relates to theories concerning net primary productivity, ambient energy, water-energy dynamics and spatial environmental heterogeneity.
Xavier Espadaler, Espadaler, X., Thomas Hickler, Ben A Woodcock, Sven Bacher, Nentwig, W., Espadaler, Xavier, Bacher, S., Hickler, Thomas, Schweiger Oliver, Espadaler Xavier, Nentwig Wolfgang, Bacher, Sven, Martin H Entling, Kumschick Sabrina, Netwig, Wolfgang, Wolfgang Nentwig, Hickler Thomas, Oliver Schweiger, Hickler, T., Woodcock, B.A., Nentwig, Wolfgang, Entling, M.H., Schweiger, O., Kumschick, S., Kumschick, Sabrina, Schweiger, Oliver, Woodcock Ben A., Bacher Sven, Entling, Martin H., Sabrina Kumschick, Entling Martin H., Woodcock, Ben A.   +32 more
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A direct comparison of the effects and mechanisms between species richness and genotype richness in a dominant species on multiple ecosystem functions

Ecology and Evolution, 2021
Both species (interspecific) richness and genotype (intraspecific) richness of dominant species have significant effects on ecosystem functioning directly or indirectly by regulating plant community functional structure.
Man Jiang, Xue Yang, Tao Wang, Yujuan Xu, Ke Dong, Luoyang He, Yulin Liu, Jinlong Wang, Nianxi Zhao, Yubao Gao   +9 more
doaj   +1 more source

Urbanization and Human Population Favor Species Richness of Alien Birds

Diversity, 2020
Human activities like urbanization and agriculture affect spatial biodiversity patterns. The presence and activities of humans richly benefit alien species, but native species usually decline in human-impacted areas.
Maria Lazarina, Mariana A. Tsianou, Georgios Boutsis, Aristi Andrikou-Charitidou, Elpida Karadimou, Athanasios S. Kallimanis   +5 more
doaj   +1 more source

Environmental determinants of avian species richness in forests in a highly urbanized subtropical city: The effects of spatial scale and open space feature

Global Ecology and Conservation, 2021
Numerous avian studies have emphasized the importance of natural/semi-natural elements, especially green spaces to conserve avian diversity in a city.
Myung-Bok Lee, Min Zhang, Sot Chan, Qiang Zhang, Xianli Che, Kai Chin Wong, Xuebing Zhao, Fasheng Zou   +7 more
doaj   +1 more source

Mapping the species richness and composition of tropical forests from remotely sensed data with neural networks [PDF]

, 2006
The understanding and management of biodiversity is often limited by a lack of data. Remote sensing has considerable potential as a source of data on biodiversity at spatial and temporal scales appropriate for biodiversity management.
Mark E.J. Cutler, Cutler, Mark E. J. ; id_orcid, Cutler, M.E.J., Foody, Giles M., Foody, G.M, Giles M. Foody   +5 more
core   +1 more source

Comparative tests of ectoparasite species richness in seabirds [PDF]

, 2007
Background: The diversity of parasites attacking a host varies substantially among different host species. Understanding the factors that explain these patterns of parasite diversity is critical to identifying the ecological principles underlying ...
Joseph Hughes, Page, R.D.M., Roderic DM Page, Page Roderic DM, Hughes, J., Hughes Joseph   +5 more
core   +1 more source

Unsaturated fish assemblages in rivers of the North-Western France : potential consequences for species introductions

Knowledge and Management of Aquatic Ecosystems, 1997
Introductions of freshwater fish into French rivers have been carried out with increasing frequency in the last decades. Thus, the potential impact of these introductions is of major concern for biologists and fishery managers. Knowledge of the degree of
BELKESSAM D., OBERDORFF T., HUGUENY B.
doaj   +1 more source

Energy Availability Factors Drive the Geographical Pattern of Tenebrionidae (Coleoptera) in the Arid and Semiarid Areas of China

Diversity, 2022
Species richness is regarded as the core index of biogeography. Estimating the correlation between species richness and modern environmental factors will be of great significance for species conservation.
Yalin Li, Yujie Wang, Hui Zhang, Chengxu Lou, Guodong Ren   +4 more
doaj   +1 more source

Predicting microbial species richness [PDF]

Proceedings of the National Academy of Sciences, 2005
Microorganisms are spectacularly diverse phylogenetically, but available estimates of their species richness are vague and problematic. For example, for comparable environments, the estimated numbers of species range from a few dozen or hundreds to tens of thousands and even half a million.
Sun-Hee, Hong, John, Bunge, Sun-Ok, Jeon, Slava S, Epstein   +3 more
openaire   +2 more sources