Results 1 to 10 of about 173,835 (195)

High canopy cover of invasive Acer negundo L. affects ground vegetation taxonomic richness [PDF]

open access: yesScientific Reports, 2021
We assessed the link between canopy cover degree and ground vegetation taxonomic richness under alien ash-leaved maple (Acer negundo) and other (native or alien) tree species. We investigated urban and suburban forests in the large city of Yekaterinburg,
D. V. Veselkin   +2 more
doaj   +5 more sources

Estimating the spatial and temporal distribution of species richness within Sequoia and Kings Canyon National Parks. [PDF]

open access: yesPLoS ONE, 2014
Evidence for significant losses of species richness or biodiversity, even within protected natural areas, is mounting. Managers are increasingly being asked to monitor biodiversity, yet estimating biodiversity is often prohibitively expensive.
Steve Wathen   +3 more
doaj   +17 more sources

Ancient origin of high taxonomic richness among insects. [PDF]

open access: yesProc Biol Sci, 2016
Insects are a hyper-diverse group, comprising nearly three-quarters of all named animal species on the Earth, but the environmental drivers of their richness and the roles of ecological interactions and evolutionary innovations remain unclear. Previous studies have argued that family-level insect richness increased continuously over the evolutionary ...
Clapham ME   +4 more
europepmc   +6 more sources

Non-native vascular flora of the Arctic: Taxonomic richness, distribution and pathways. [PDF]

open access: yesAmbio, 2020
We present a comprehensive list of non-native vascular plants known from the Arctic, explore their geographic distribution, analyze the extent of naturalization and invasion among 23 subregions of the Arctic, and examine pathways of introductions. The presence of 341 non-native taxa in the Arctic was confirmed, of which 188 are naturalized in at least ...
Wasowicz P   +11 more
europepmc   +6 more sources

Improved inference of taxonomic richness from environmental DNA. [PDF]

open access: yesPLoS ONE, 2013
Accurate estimation of biological diversity in environmental DNA samples using high-throughput amplicon pyrosequencing must account for errors generated by PCR and sequencing.
Matthew J Morgan   +4 more
doaj   +4 more sources

Taxonomic uncertainty and the challenge of estimating global species richness

open access: yesJournal of Biogeography, 2022
It is a biogeographical trope that after several centuries of explora-tion, our knowledge of the world's biodiversity is still staggeringly incomplete (Meyer et al., 2016), even for well-studied groups such as trees (Keppel et al., 2021). Thus, when a study publishes a new esti-mate of the number of known (and unknown) tree species on Earth, it often ...
Juliana Stropp, Thaise Emilio
exaly   +3 more sources

Estimating global bee species richness and taxonomic gaps [PDF]

open access: yesNature Communications
Robust species richness estimates are critical for meaningful conservation prioritisation, understanding ecosystem resilience, and studying evolutionary processes. Yet, they remain elusive even for some of the best-studied groups and regions. As keystone
James B. Dorey   +6 more
doaj   +2 more sources

Determinants of species richness patterns in the Netherlands across multiple taxonomic groups [PDF]

open access: yesBiodiversity and Conservation, 2009
We examined the species richness patterns of five different species groups (mosses, reptiles and amphibians, grasshoppers and crickets, dragonflies, and hoverflies) in the Netherlands (41,500 km2) using sampling units of 5 × 5 km. We compared the spatial
Barendrecht, A.   +3 more
core   +7 more sources

Freshwater Mollusca of Kazakhstan (Central Asia): species composition and estimation of taxonomic richness. [PDF]

open access: yesZookeys
Central Asia, including its freshwater basins, belongs to the Palearctic realm but exhibits significant faunal heterogeneity with localised hotspots of endemism. While several Central Asian countries have been the subject of malacological reviews, Kazakhstan, the largest country of the region, lacks a comprehensive and taxonomically updated species ...
Nekhaev IO   +3 more
europepmc   +3 more sources

Revisiting Jablonski (1993): cladogenesis and range expansion explain latitudinal variation in taxonomic richness [PDF]

open access: yesJournal of Evolutionary Biology, 2007
AbstractThe increase in diversity towards the equator arises from latitudinal variation in rates of cladogenesis, extinction, immigration and/or emigration of taxa. We tested the relative contribution of all four processes to the latitudinal gradient in 26 marine invertebrate orders with extensive fossil records, examined previously by David Jablonski.
P R, Martin, F, Bonier, J J, Tewksbury
exaly   +3 more sources

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