نتایج جستجو برای: plant cover

تعداد نتایج: 497813  

2011
Jara Andreu Esperanza Manzano-Piedras Ignasi Bartomeus

We evaluated the ecological success of the manual removal of Carpobrotus species, a putative hybrid complex of a South African perennial mat-forming plant, by comparing treated, noninvaded, and invaded plots across coastal Andalucía in southern Spain. As a measure of the management effectiveness, we quantified the density of Carpobrotus seedlings and resprouts in treated plots one year after tr...

2015
Hélène Tribouillois Florian Fort Pablo Cruz Raphaël Charles Olivier Flores Eric Garnier Eric Justes

Cover crops can produce ecosystem services during the fallow period, as reducing nitrate leaching and producing green manure. Crop growth rate (CGR) and crop nitrogen acquisition rate (CNR) can be used as two indicators of the ability of cover crops to produce these services in agrosystems. We used leaf functional traits to characterise the growth strategies of 36 cover crops as an approach to ...

Journal: :Journal of nematology 2004
K-H Wang R McSorley R N Gallaher

Two experiments were conducted in north-central Florida to examine the effects of various winter cover crops on plant-parasitic nematode populations through time. In the first experiment, six winter cover crops were rotated with summer corn (Zea mays), arranged in a randomized complete block design. The cover crops evaluated were wheat (Triticum aestivum), rye (Secale cereale), oat (Avena sativ...

The degradation rate of Mediterranean steppes, especially in North Africa is 1% per year, and this considered a high  rate of degradation. This study conducted in 2014 in the south slope of the Al-Jabal Al-Akhdar, northeast Libya to quantify the vegetation recovery rate and assess selected Vegetation Indices (VIs) for mapping rangelands degradation status using remote sensing technology. Throug...

2015
Santonu Goswami John A. Gamon

15 16 Here we investigate relationships between NDVI, Biomass, and Leaf Area Index (LAI) for 17 six key plant species near Barrow, Alaska. We explore how key plant species differ in 18 biomass, leaf area index (LAI) and how can v e g e t a t i o n spectral indices be used to 19 estimate biomass and LAI for key plant species. A vegetation index (VI) or a spectral 20 vegetation index (SVI) is a q...

2016
Jiri Dolezal Miroslav Dvorsky Martin Kopecky Pierre Liancourt Inga Hiiesalu Martin Macek Jan Altman Zuzana Chlumska Klara Rehakova Katerina Capkova Jakub Borovec Ondrej Mudrak Jan Wild Fritz Schweingruber

A rapid warming in Himalayas is predicted to increase plant upper distributional limits, vegetation cover and abundance of species adapted to warmer climate. We explored these predictions in NW Himalayas, by revisiting uppermost plant populations after ten years (2003-2013), detailed monitoring of vegetation changes in permanent plots (2009-2012), and age analysis of plants growing from 5500 to...

Journal: :Universum: himiâ i biologiâ 2023

Journal: :East African journal of environment and natural resources 2022

While some research has been conducted in sub–Saharan Africa on the alien invasive Parthenium hysterophorus, little work assessed whether it is poses negative impact native forages. A field survey was carried out to study dominant co–existing plant species, and its abundance, forage cover. We found that non–natives were plants with P. hysterophorus compared natives. Plant species (r = -0.889, P...

2010
John G. Bishop Niamh B. O'Hara Jonathan H. Titus Jennifer L. Apple Richard A. Gill Louise Wynn

BACKGROUND The effect of low nutrient availability on plant-consumer interactions during early succession is poorly understood. The low productivity and complexity of primary successional communities are expected to limit diversity and abundance of arthropods, but few studies have examined arthropod responses to enhanced nutrient supply in this context. We investigated the effects of nitrogen (...

For an optimum use of natural resources in the sustainable development trend, there is a need to identify ecological resources in the shortest period of time and minimum possible cost. In this article, we aimed Management ecosystem by Assessment of plant covers changes at Taleghan Township in a twenty year period. Percentage of landscape and number of patch were among the metrics that were calc...

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