نتایج جستجو برای: ecological requirements

تعداد نتایج: 301980  

Journal: :Frontiers in Marine Science 2021

Atlantic menhaden is an important forage fish and the target of largest fishery along US East Coast by volume. Since 1999, managers at States Marine Fisheries Commission, stakeholders, scientists have been interested in developing ecological reference points (ERPs) that account for menhaden’s role as a species. To accomplish this, we developed suite modeling approaches incorporated predation on...

Journal: :Ecology 2008
C Calenge G Darmon M Basille A Loison J-M Jullien

The Mahalanobis distances have been introduced in habitat selection studies for the estimation of environmental suitability maps (ESMs). The pixels of raster maps of a given area correspond to points in the multidimensional space defined by the mapped environmental variables (ecological space). The Mahalanobis distances measure the distances in this space between these points and the mean of th...

2004
Lluı́s Brotons Wilfried Thuiller Miguel B. Araújo Alexandre H. Hirzel

Habitat suitability models can be generated using methods requiring information on species presence or species presence and absence. Knowledge of the predictive performance of such methods becomes a critical issue to establish their optimal scope of application for mapping current species distributions under different constraints. Here, we use breeding bird atlas data in Catalonia as a working ...

Journal: :جنگل و فرآورده های چوب 0
احمد علیجانپور دانشیار/ دانشگاه ارومیه سالار تارم دانشگاه ارومیه جواد اسحاقی راد دانشگاه اومیه

crataegus as a woody multipurpose species based on fruit production is very important for local residents in the northern zagros forests located at the south of west azerbaijan province. this study aimed at determining the quantitative characteristics, soil and physiographic properties in the crataegus spp. stands. in current study, eight crataegus habitats were selected and 3-5 0.1 ha circular...

Journal: :محیط زیست طبیعی 0
حسین وارسته مرادی استادیار دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

the evaluation of ecological characteristics of wildlife species has fundamental role in species management, because taking a decision for proper method of management is only possible by characterizing of ecological requirements of a species. in this study, suitable habitat of middle spotted woodpecker was investigated in golestan national park. presence and absence of birds and environmental v...

Journal: :The Science of the total environment 2001
P J Sydelko I Hlohowskyj K Majerus J Christiansen J Dolph

Ecological risk assessment requires the integration of a wide range of data on anthropogenic processes, ecological processes and on processes related to environmental fate and transport. It is a major challenge to assemble a simulation system that can successfully capture the dynamics of complex ecological systems and an even more serious challenge to be able to adapt such a simulation to shift...

Requirements engineering (RE) is often seen as an essential facet in software development. It is a vital process before each project starts. In the context of systems engineering, an understanding and application of systems theory and practice is also relevant to RE. The contexts in which RE takes place habitually involve human activities. Therefore, RE needs to be sensitive to how people perce...

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2002
Edward D Breslin

The paper explores the development of ecological sanitation (EcoSan) within the small-town context of Lichinga, Niassa Province, Mozambique. The paper looks at how ESTAMOS (a Mozambican NGO) and WaterAid introduced EcoSan in Lichinga, how families and communities have responded to EcoSan, and key lessons learned during the process to date that could be relevant to others within and beyond Mozam...

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