نتایج جستجو برای: plant species restoration and animal selectivity in semi

تعداد نتایج: 21849927  

Journal: :Ecology 2007
Christine R Whitcraft Lisa A Levin

Plant cover is a fundamental feature of many coastal marine and terrestrial systems and controls the structure of associated animal communities. Both natural and human-mediated changes in plant cover influence abiotic sediment properties and thus have cascading impacts on the biotic community. Using clipping (structural) and light (shading) manipulations in two salt marsh vegetation zones (one ...

آصالح, فاطمه, شهریاری, علیرضا, عابدی کوپایی, جهانگیر, نوری, سهیلا,

Water crisis is an important issue in arid and semi-arid regions like Iran. Due to drought events, the situation has become more acute in recent years. Therefore, where good quality water is not available, the use of unconventional water has increased considerably. One of these resources is municipal wastewater that can also provide some of the nutrients needed for plant nutrition. Therefore, i...

The balanced grazing is a critical managing factor regarding to resource conservation and quantitative and qualitative increase of plants production at the rangeland ecosystems. In addition, understanding the effects of different grazing intensity on the dominant plants can be used as a valuable tool in order to resource management. The current study aimed to determine vulnerability and toleran...

2012
Vicky M. Temperton Lea L. A. Märtin Daniela Röder Andreas Lücke Kathrin Kiehl

δ(15)N signals in plant and soil material integrate over a number of biogeochemical processes related to nitrogen (N) and therefore provide information on net effects of multiple processes on N dynamics. In general little is known in many grassland restoration projects on soil-plant N dynamics in relation to the restoration treatments. In particular, δ(15)N signals may be a useful tool to asses...

2008
Robert D. Cox Edith B. Allen

1. Restoration of semi-arid shrub ecosystems often requires control of invasive grasses but the effects of these grass-control treatments on native and exotic forbs have not been investigated adequately to assess long-term stability. In southern California, coastal sage scrub (CSS) vegetation is one semi-arid shrub community that has been invaded extensively by both exotic grasses and exotic fo...

Journal: :مرتع و آبخیزداری 0
زینب جعفریان استادیار استادیار دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران لیلا طایفه سیدعلیخوانی دانشجوی کارشناسی ارشد مرتعداری، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران رضا تمرتاش مربی دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران

carbon sequestration potential of three species including agropyron elengatum, stipa barbata and artemisia aucheri was evaluated in parts of a semi-arid rangeland in this study. after determination and selecting key areas as study sites, sampling from vegetation and soil, based on randomized systematic method, was done and 90 plant and 45 soil samples were taken, respectively. shooting and root...

Livestock grazing practices in rangelands are being recognized as management tool for environmental protection and increased livestock productivity. Continuous grazing has been largely reported to reduce pasture productivity and increase environmental degradation. Rotational grazing is an alternative to continuous grazing and is considered to reduce negative environmental effects and provide qu...

اسدی, حامد, اسماعیل زاده, امید, سخاوت, صالح,

  This study was investigated the above-ground vegetation and soil seed bank flora in three site of Albizia julibrissin Durazz. In Hyrcanian Lowland Forests (including Haloomsar, Anjilisra forests and Sisangan Box tree (Buxus hyrcanus Pojark) reserve). Aboveground vegetation was sampled by 68 plots of 400 m2 during late June and seed bank flora was studied by seedling emergence method. The resu...

In dry lands, semi-circular bund has been considered as a management practice used to restore the ecological revival in terms of vegetation enrichment and soil amelioration. This study was conducted to investigate the effects of semi-circular bunds on vegetation cover and some soil properties in Koteh rangeland, Sistan and Baloochestan province, Iran (2014). Adjacent to the semi-circular bund a...

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