Issues in Conservation

نویسندگان

  • EDUARDO T. MEZQUIDA
  • STEVEN J. SLATER
  • CRAIG W. BENKMAN
چکیده

Coyotes (Canis latrans) are lethally controlled throughout the range of Greater Sage-Grouse (Centrocercus urophasianus) and it has been suggested that such control may benefit sage-grouse. However, the perceived benefits of control are based on the direct effects of coyotes on sage-grouse and largely ignore potential indirect interactions. Here, we summarize some of the evidence for direct effects in a simplified food web including coyotes and sage-grouse. There is very little evidence to suggest that coyotes have much of a direct negative effect on sage-grouse, but there is considerable evidence supporting direct interactions that would lead to positive indirect effects between coyotes and sage-grouse. The three likely forms of positive indirect effects arise because coyotes reduce the potential negative effects resulting from mesopredator release and apparent and exploitative competition. Mesopredator release would adversely affect sagegrouse if a decrease in coyotes allowed an increase in foxes (especially Vulpes vulpes), badgers (Taxidea taxus), and Common Ravens (Corvus corax), mesopredators that prey on sage-grouse eggs and young. A decrease in coyotes is likely to allow jackrabbits (Lepus spp.) to increase, which would cause sage-grouse to suffer from apparent competition if Golden Eagles (Aquila chrysaetos), which are perhaps the most important predator of adult sage-grouse, then increase in response to the increase in jackrabbits. This increase in jackrabbits may also depress the availability of sagebrush (Artemisia spp.) and forbs, leading to an increase in exploitative competition with sage-grouse. For these reasons, we argue that intense and extended lethal coyote control is likely detrimental to sage-grouse conservation.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Rangeland Ecology, Management and Conservation Benefits

The book written by seventeen experts in the field of rangeland management, this compilation of essays brings to light the latent issues concerning this subject to readers all over the globe. Though technical approaches can address some issues, social processes ultimately prevent the balancing of these matters. Socio-economic and political institutions are often a stumbling block for improving ...

متن کامل

مقایسه‎ی تحلیلی نگرش غربی حفاظت با جهان‌بینی اسلامی در تبیین وجوه فراکالبدی میراث معماری

In creating and continuation of the life of architectural heritage, there have always been numerous aspects influencing; recognizing such aspects is a crucial point in conserving the works of every land. Today, hastened integration of historical countries with modern conserving current has led to a shift in definition and understanding metaphysical aspects of the works within such countries. Si...

متن کامل

Developing a Conceptual Framework of Integrity in Urban Heritage Conservation

The concept of integrity, as a factor of sustaining values and significance of cultural heritage, is considered to be a key element in the process of urban heritage conservation. Review and analysis of documents, conventions and theories concerning the role of integrity in urban heritage conservation shows that in recent decades, the concept of integrity has attracted attention worldwide in the...

متن کامل

Examination of value added of conservation and restoration of urban historic textures in district 12 of Tehran

The growth of urban populations in recent decades requires physical elements such as residential, commercial and cultural spaces and the development of infrastructure such as streets and highways, which will open a new horizon to the historic texture of cities and how to preserve and restore them. The development of new urban textures along with the lack of attention to the historic texture and...

متن کامل

The necessity for a national consent on the conservation of sturgeon in the Caspian Sea

In the present study, the fishing status and production of caviar from wild sturgeon as well as the stocks rehabilitation of these species in the Caspian Sea have been analyzed over the past few years. Unfortunately, due to certain reasons such as overfishing and poaching, destruction of spawning areas and natural habitats, environmental pollution and reduced the number of released juveniles st...

متن کامل

An overview of the status, trends and challenges of freshwater fish research and conservation in Malaysia

Freshwater fish biodiversity is a precious natural asset in terms of economic, cultural and scientific interest. And yet, the inland freshwater ecosystem in Malaysia is declining at a far greater rate than terrestrial ecosystems in the tropics. What happened, and what is being done to address the crisis? This paper extracts findings from the latest literature and explores overarching issues per...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006