Results 1 to 10 of about 633,514 (164)
Unveiling global species abundance distributions. [PDF]
Nat Ecol Evol, 2023 AbstractWhether most species are rare or have some intermediate abundance is a long-standing question in ecology. Here, we use more than one billion observations from the Global Biodiversity Information Facility to assess global species abundance distributions (gSADs) of 39 taxonomic classes of eukaryotic organisms from 1900 to 2019.
Callaghan CT +4 more
europepmc +6 more sources
Functional Traits Are Good Predictors of Tree Species Abundance Across 101 Subtropical Forest Species in China [PDF]
Frontiers in Plant Science, 2021 What causes variation in species abundance for a given site remains a central question in community ecology. Foundational to trait-based ecology is the expectation that functional traits determine species abundance. However, the relative success of using
Ronghua Li +12 more
doaj +2 more sources
How species richness and total abundance constrain the distribution of abundance
Ecology Letters, 2013 AbstractThe species abundance distribution (SAD) is one of the most intensively studied distributions in ecology and its hollow‐curve shape is one of ecology's most general patterns. We examine the SAD in the context of all possible forms having the same richness (S) and total abundance (N), i.e. the feasible set.
Kenneth J Locey, Ethan P White
exaly +5 more sources
A general pattern of the species abundance distribution. [PDF]
PeerJ, 2018 Since the 1970s, species abundance distributions (SADs) have been one of the most fundamental issues in ecology and have frequently been investigated and reviewed. However, there was surprisingly little consensus. This study focuses on three essential questions. (1) Is there a general pattern of SAD that no community can violate it?
Su Q.
europepmc +5 more sources
Koedoe: African Protected Area Conservation and Science, 2023 Global and regional degradation and loss of aquatic systems can negatively affect wetland-dependent waterbirds. The Wilderness Lakes Complex in South Africa, which incorporates the Wilderness Ramsar site, supports populations of 68 waterbird species ...
Ian A. Russell
doaj +1 more source
On plotting species abundance distributions [PDF]
Journal of Animal Ecology, 2006 Summary There has been a revival of interest in species abundance distribution (SAD) models, stimulated by the claim that the log‐normal distribution gave an underestimate of the observed numbers of rare species in species‐rich assemblages. This led to the development of the neutral Zero Sum Multinomial distribution (ZSM) to better fit the observed ...
John S, Gray +2 more
openaire +2 more sources
Occupancy, Spatial Variance, and the Abundance of Species [PDF]
The American Naturalist, 2003 A notable and consistent ecological observation known for\ud a long time is that spatial variance in the abundance of a\ud species increases with its mean abundance and that this relationship typically conforms well to a simple\ud power law (Taylor 1961). Indeed, such models can be\ud used at a spectrum of spatial scales to describe spatial\ud variance
Gaston, K.J., He, F.
openaire +4 more sources
Estimating Species Abundance from Occurrence [PDF]
The American Naturalist, 2000 The number of individuals, or the abundance, of a species\ud in an area is a fundamental ecological parameter and a\ud critical consideration when making management and conservation decisions (Andrewartha and Birch 1954; Krebs\ud 1978; Gaston 1994; Caughley and Gunn 1996).
Gaston, K.J., He, F.
openaire +4 more sources
Nature Conservation Research: Заповедная наука, 2020 Long-term conservation schemes usually concern the rarest species, extremely threatened. Investigating Red Data Book species is inescapable for determining their threatened category and optimal measures for the protection.
Nigar Mursal +2 more
doaj +1 more source
The Alien Plants That Threaten South Africa’s Mountain Ecosystems
Land, 2021 The six major mountain ranges in South Africa support critically important ecosystem services—notably water production—and are rich in biodiversity and endemism.
Kim Canavan +6 more
doaj +1 more source