Results 1 to 10 of about 35,784 (239)

Evaluation of Toxicity Potential and Spatial Distribution of Ecological Risk of Heavy Metals in Surface Sediments of Anzali International Wetland Using GIS [PDF]

علوم محیطی, 2022
Introduction; Due to the potential toxicity and ecological risk of heavy metals in aquatic ecosystems, measuring and evaluating their concentration in different parts of aquatic environments is very necessary.
Zhaleh Amini, Reza Anvaripour, masoud Hatami-manesh, Jaber Aazami   +3 more
doaj   +1 more source

Adults have more male-biased sex ratios than first-winter juveniles in wintering duck populations

Avian Research, 2021
Background The long-term monitoring of demographic changes in waterbird populations remains limited, but such information can be valuable for conservationists and waterbird managers.
Kevin A. Wood, Kane Brides, Maurice E. Durham, Richard D. Hearn   +3 more
doaj   +1 more source

Behavioural and energetic consequences of competition among three overwintering swan (Cygnus spp.) species

Avian Research, 2021
Background Winter numbers of the northwest European population of Bewick’s Swans (Cygnus columbianus bewickii) declined recently by c. 40%. During the same period, numbers of two sympatric and ecologically-similar congeners, the Mute Swan (Cygnus olor ...
Kevin A. Wood, Julia L. Newth, Geoff M. Hilton, Eileen C. Rees   +3 more
doaj   +1 more source

Bold Frogs or Shy Toads? How Did the COVID-19 Closure of Zoological Organisations Affect Amphibian Activity?

Animals, 2021
Amphibians are an understudied group in the zoo-focussed literature. Whilst commonly housed in specialist exhibits and of real conservation value due to the global extinction crisis, amphibian welfare is not often investigated empirically in zoo settings.
Jack Boultwood, Michelle O’Brien, Paul Rose   +2 more
doaj   +1 more source

Grazing Exclusion Changed the Complexity and Keystone Species of Alpine Meadows on the Qinghai-Tibetan Plateau

Frontiers in Ecology and Evolution, 2021
Grazing exclusion is an effective approach to restore degraded grasslands. However, the effects of grazing exclusion on keystone species and the complexity of plant community were poorly investigated.
Yong Zhang, Yong Zhang, Qingzhu Gao, Hasbagan Ganjurjav, Shikui Dong, Qiuzhu Zheng, Yandan Ma, Kemin Liang   +7 more
doaj   +1 more source

Complete mitochondrial genome of Yunnan-Guizhou Plateau endemic fish, Discogobio macrophysallidos, in China

Mitochondrial DNA. Part B. Resources, 2020
The complete mitochondrial genome of Discogobio macrophysallidos was first determined and analyzed in this work. Its mitochondrial genome is 16,593 bp in length, consisting of 13 protein-coding genes, 22 transfer RNA (tRNA) genes, two ribosomal RNA (rRNA)
Yuping Qiu, Jinjin Jin, Guozhu Chen
doaj   +1 more source

Evolutionary correlation of water-related traits between different structures of Dendrobium plants

Botanical Studies, 2020
Background Leaf water conservation and pseudobulb water storage are two of the strategies commonly employed by epiphytic plants to adapt to dry environments.
Mei Sun, Chun-Hui Feng, Zhen-Ya Liu, Kun Tian   +3 more
doaj   +1 more source

Land Degradation Changes the Role of Above- and Belowground Competition in Regulating Plant Biomass Allocation in an Alpine Meadow

Frontiers in Plant Science, 2022
The allocation pattern of plant biomass presents the strategy of the plant community to adopt environmental changes, while the driver of biomass allocation is still unclear in degraded alpine grassland ecosystems.
Yong Zhang, Yong Zhang, Qiuzhu Zheng, Qiuzhu Zheng, Xiaoxia Gao, Yandan Ma, Yandan Ma, Kemin Liang, Kemin Liang, Haitao Yue, Haitao Yue, Xiaoxia Huang, Kaiting Wu, Kaiting Wu, Xiaorong Wang, Xiaorong Wang   +15 more
doaj   +1 more source

A More Effective Ramsar Convention for the Conservation of Mediterranean Wetlands

Frontiers in Ecology and Evolution, 2019
The Ramsar Convention is the multilateral agreement aimed at protecting wetlands globally. Wetlands are particularly recognized for their role in the Mediterranean biodiversity hotspot by providing key habitats for endemic and migratory species, directly
Ilse R. Geijzendorffer, Coralie Beltrame, Laurent Chazee, Elie Gaget, Elie Gaget, Thomas Galewski, Anis Guelmami, Christian Perennou, Nadège Popoff, Nadège Popoff, Carlos A. Guerra, Carlos A. Guerra, Roxanne Leberger, Roxanne Leberger, Jean Jalbert, Patrick Grillas   +15 more
doaj   +1 more source

Tolerance niche expansion and potential distribution prediction during Asian openbill bird range expansion

Ecology and Evolution, 2021
It is prevalent to use ecological niche models in the analysis of species expansion and niche changes. However, it is difficult to estimate the niche when alien species fail to establish in exotic areas.
Yu Lei, Qiang Liu
doaj   +1 more source