Results 21 to 30 of about 1,567,635 (316)

Assemblages of herb-dwelling spiders (Araneae) of various steppe types in Ukraine and the Central Chernozem region of Russia [PDF]

open access: yes, 2012
A total of 107 spider species from 15 families were recorded in the herbaceous vegetation of the steppe ecosystems of Ukraine and the Central Chernozem region of Russia. Araneidae, Thomisidae, Salticidae and Theridiidae were the most species-rich.
Polchaninova, Nina Y.
core   +2 more sources

Defoliation-induced changes in foliage quality may trigger broad-scale insect outbreaks

open access: yesCommunications Biology, 2022
Progression of a spruce budworm outbreak over seven years is associated with increased soil nutrient fluxes and availability and improved foliage quality in surviving host trees. This could create a bottom-up feedback that sustains an insect outbreak.
Louis De Grandpré   +9 more
doaj   +1 more source

Natural recovery of genetic diversity by gene flow in reforested areas of the endemic Canary Island pine, Pinus canariensis

open access: yes, 2007
The endemic pine, Pinus canariensis, forms one of the main forest ecosystems in the Canary Islands. In this archipelago, pine forest is a mosaic of natural stands (remnants of past forest overexploitation) and artificial stands planted from the 1940's ...
Adams   +34 more
core   +4 more sources

Spatial pattern of relict beech (Fagus sylvatica L.) forests in the Sudetes of the Czech Republic and Poland

open access: yesJournal of Forest Science, 2016
Horizontal structure of forest stands largely affects the competitive relationships between tree individuals and plays a significant role in the stand dynamics.
D. Bulušek   +5 more
doaj   +1 more source

LAND USE CHANGES AND FLORAL DIVERSITY IN KENYA’S MT. ELGON FOREST ECOSYSTEM

open access: yesTropical and Subtropical Agroecosystems, 2021
Background. Montane forests encompass spectacular landscapes, a wide variety of ecosystems, a great diversity of species, and distinctive human communities. Mountain forests support about one quarter of world’s terrestrial biodiversity and include nearly
Nelly Nambande Masayi   +2 more
doaj   +1 more source

Age and sex-selective predation moderate the overall impact of predators [PDF]

open access: yes, 2014
© 2014 The Authors. Journal of Animal Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society. Acknowledgements: Thanks to J. Reid, S. Redpath, A.
Davison, Martin   +6 more
core   +5 more sources

PERBAIKAN TEKNIK PENEBANGAN UNTUK MINIMASI LIMBAH PEMBALAKAN DENGAN CARA PENURUNAN TINGGI MULUT TAKIK REBAH

open access: yesJurnal Penelitian Hasil Hutan (Journal of Forest Products Research), 2017
Felling technique in logging operation affect both quantity and quality of logs produced. Improperfelling operation may damage the wood in various ways such as splitting, splintering, and breakage. It leaves more wood wastes in the forest.
Wesman Endom
doaj   +1 more source

Spiders from Heading Bluegrass (POA Prantensis L.) in Roseau County, Minnesota [PDF]

open access: yes, 2017
Northwestern Minnesota is one of the principal producers of Kentucky bluegrass (Poa pratensis L.) seed in the United States. Extensive areas of cropland in Roseau County are devoted to this seed production.
Cutler, Bruce
core   +3 more sources

Vegetation Dynamics in Ecuador [PDF]

open access: yes, 2019
Global forest cover has suffered a dramatic reduction during recent decades, especially in tropical regions, which is mainly due to human activities caused by enhanced population pressures.
González-Jaramillo, Víctor Hugo
core   +1 more source

A comparison of presettlement and modern forest composition along an elevation gradient in central New Hampshire [PDF]

open access: yes, 2011
Tree species composition is influenced not only by edaphic and climatic factors but also by natural and human-caused disturbances. To understand interactions among these influences, we compared forest species composition data from the time of European ...
Cogbill, Charles V.   +3 more
core   +3 more sources

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