نتایج جستجو برای: vegetation environment relationships

تعداد نتایج: 769809  

2012
Andrew Siefert Catherine Ravenscroft David Althoff Juan C. Alvarez-Yépiz Benjamin E. Carter Kelsey L. Glennon J. Mason Heberling In Su Jo Alyssa Pontes Amy Sauer Adam Willis Jason D. Fridley

Siefert, A. (Corresponding author, [email protected]), Ravenscroft, C. ([email protected]),Althoff, D. ([email protected]), Carter, B.E. ([email protected]), Glennon, K.L. ([email protected]), Heberling, J.M. ([email protected]), Jo, I.S. ([email protected]), Pontes, A. ([email protected]), Sauer, A. ([email protected]),Willis, A. (adwillis@syr. edu) & Fridley, J.D. ([email protected]): Department of Biology...

2014
Karen Ikin Philip S. Barton Ingrid A. Stirnemann John R. Stein Damian Michael Mason Crane Sachiko Okada David B. Lindenmayer

Improving biodiversity conservation in fragmented agricultural landscapes has become an important global issue. Vegetation at the patch and landscape-scale is important for species occupancy and diversity, yet few previous studies have explored multi-scale associations between vegetation and community assemblages. Here, we investigated how patch and landscape-scale vegetation cover structure wo...

Journal: :Environmental management 2013
Zhiwei Wu Hong S He Yu Liang Longyan Cai Bernard J Lewis

Fire is a dominant process in boreal forest landscapes and creates a spatial patch mosaic with different burn severities and age classes. Quantifying effects of vegetation and topography on burn severity provides a scientific basis on which forest fire management plans are developed to reduce catastrophic fires. However, the relative contribution of vegetation and topography to burn severity is...

2017
Jean-François Ponge

Interactions between soil animals and their environment can be described in terms of positive and negative feed-back loops taking place in the build-up and steady-state of soil ecosystems, respectively. The size of animals determines the scale at which they interact with their physical and biotic environment. Nevertheless varying scales at which animals intervene in functional processes is not ...

Taxus baccata is one of the few native needleleave species of north and northwest forests of Iran, distributed as a single tree or sometimes in spots. The Gazoo Yew reserve is one of the most valuable habitats of Taxus baccata in north of Iran, which has not been studied sufficiently. This study aimed to investigate the vegetation and the forest types as well as the effects of the environmental...

2014
Antonius G. T. Schut Grant W. Wardell-Johnson Colin J. Yates Gunnar Keppel Ireneusz Baran Steven E. Franklin Stephen D. Hopper Kimberley P. Van Niel Ladislav Mucina Margaret Byrne

Identification of refugia is an increasingly important adaptation strategy in conservation planning under rapid anthropogenic climate change. Granite outcrops (GOs) provide extraordinary diversity, including a wide range of taxa, vegetation types and habitats in the Southwest Australian Floristic Region (SWAFR). However, poor characterization of GOs limits the capacity of conservation planning ...

2009
Tayebeh Tabatabaie Fazel Amiri

SUMMARY Operational monitoring of vegetative cover by remote sensing currently involves the utilisation of vegetation indices. Vegetation indices are widely used for assessing and monitoring ecological variables such as vegetation cover, above-ground biomass and leaf area index. This study reviewed and evaluated different vegetation indices for estimating vegetation cover in rangelands in Cente...

2017
Åsa N. Austin Joakim P. Hansen Serena Donadi Johan S. Eklöf

Field surveys often show that high water turbidity limits cover of aquatic vegetation, while many small-scale experiments show that vegetation can reduce turbidity by decreasing water flow, stabilizing sediments, and competing with phytoplankton for nutrients. Here we bridged these two views by exploring the direction and strength of causal relationships between aquatic vegetation and turbidity...

2005
S. M. RIEDEL H. E. EPSTEIN

In this study, seasonal field measurements of the normalized difference vegetation index (NDVI), using a field spectroradiometer, and leaf area index (LAI), using a LI-COR LAI-2000 Plant Canopy Analyzer, were compared with above-ground phytomass data to investigate relationships between vegetation properties and spectral indices for four distinct tundra vegetation types at Ivotuk, Alaska (68.49...

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