نتایج جستجو برای: natural landscapes

تعداد نتایج: 499527  

1998
CHARLES BLACK PAUL H. ZEDLER

We review the status of five vernal pool creation and restoration projects in San Diego County that were prompted by efforts to mitigate for damage to or destruction of Pogogyne abramsii and Eryngium aristulatum ssp. parishii populations. The first project was begun in 1981 and the latest in 1992. Some degree of success, defined as persistence of significant populations of the target species, w...

2015
Houston Wilson Albie F. Miles Kent M. Daane Miguel A. Altieri S. Kaan Kurtural

This study evaluated how the proportional area of natural habitat surrounding a vineyard (i.e. landscape diversity) worked in conjunction with crop vigor, cultivar and rootstock selection to influence biological control of the western grape leafhopper (Erythroneura elegantula Osborn). The key natural enemies of E. elegantula are Anagrus erythroneurae S. Trjapitzin & Chiappini and A. daanei Tria...

Journal: :The American naturalist 2014
Francesco Carrara Andrea Rinaldo Andrea Giometto Florian Altermatt

Habitat fragmentation and land use changes are causing major biodiversity losses. Connectivity of the landscape or environmental conditions alone can shape biodiversity patterns. In nature, however, local habitat characteristics are often intrinsically linked to a specific connectivity. Such a link is evident in riverine ecosystems, where hierarchical dendritic structures command related scalin...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2006
Tatyana A Rand Svata M Louda

Habitat loss and fragmentation can have strong negative impacts on populations of some native species. Spillover of generalist natural enemies from the surrounding landscape matrix is one mechanism potentially generating such effects, yet this has been rarely studied in insects. We examined the influence of habitat conversion to agriculture on the abundance and potential effects of predatory co...

Journal: :Environmental monitoring and assessment 2017
Brian Buma Jennifer K Costanza Kurt Riitters

The scale of investigation for disturbance-influenced processes plays a critical role in theoretical assumptions about stability, variance, and equilibrium, as well as conservation reserve and long-term monitoring program design. Critical consideration of scale is required for robust planning designs, especially when anticipating future disturbances whose exact locations are unknown. This resea...

2008
C. Gaucherel

The landscapes currently studied in ecology are either " discontinuous " (category-based or patch-based), as in the case of mosaics of agricultural units, or of more " continuous " type (raster lattices), as used for representing elevation or other ecological gradients. The main landscape models either involve explicit processes or are neutral, recreating spatial patterns in the absence of stud...

2014
Marion Coulon Laurence Henry Audrey Perret Hugo Cousillas Martine Hausberger Isabelle George

The aim of the present study was to investigate the effects of video presentations of natural landscapes on European starlings' (Sturnus vulgaris) stereotypic behaviours (SBs) and other abnormal repetitive behaviours (ARBs) and to evaluate the impact of past experience by comparing wild-caught and hand-reared starlings' reactions. Ten wild-caught and five hand-reared starlings were presented 1-...

2017
Anke Müller Maria Dahm Peder Klith Bøcher Meredith Root-Bernstein Jens-Christian Svenning

After centuries of range contraction, many megafauna species are recolonizing parts of Europe. One example is the red deer (Cervus elaphus), which was able to expand its range and is now found in half the areas it inhabited in the beginning of the 19th century. Herbivores are important ecosystem engineers, influencing e.g. vegetation. Knowledge on their habitat selection and their influence on ...

2004
Clark L. Erickson

the past and present, I am concerned about the low value placed on cultural landscapes by national and international agencies charged with promoting, protecting, and managing cultural heritage in the developing world. My research in Bolivia and Peru focuses on a particular class of unappreciated cultural landscape, the mundane, traditional agricultural landscape (Fig. 1).1 It is difficult to co...

2008
Anna E. Clark

why version: answers the question “Why are you going on vacation?” I feel like a long vacation, somewhere far away. I love to travel. Mexico has places where I can relax and also see some amazing natural landscapes. That’s why I choose Mexico as the destination. There are great beaches and many important cultural sites Clark, Semin / Conversational Relevance 165

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