نتایج جستجو برای: ecological changing

تعداد نتایج: 244531  

Journal: :Urban planning 2021

Cities across the world are changing rapidly. Driven by population growth, migration, economic decline in rural areas, political instabilities, and even more recently, Covid-19 pandemic, urban systems spaces to accommodate moving people new functions. In many cases, these trends contribute increased levels of inequality, poverty, food insecurity, unemployment, while warnings about impact climat...

Journal: :Forests 2021

Conflicts are ubiquitous in forest management because of several overlapping temporal and spatial issues (see examples tropical temperate areas [...]

2008
Mark E. Baird Iain M. Suthers

One source of inaccuracy in non-linear deterministic ecological models is the growth of initial condition errors. A size-resolved pelagic ecosystem model is used to investigate the effects of changing model structural complexity on the growth rate of initial condition errors. Structural complexity is altered by: (1) changing the number of biological size-classes; and (2) changing prey size-rang...

Journal: :Agronomy 2021

Since ancient times, locusts have been serious pests wreaking havoc on settled agriculture throughout much of the world. Numerous locust practices developed to control infestations. This has led most commentaries portraying infestations only in a negative light while focusing finding best management for suppressing populations and lessening crop damage caused by swarms. Yet, are also great ecol...

Journal: :Water 2021

The effects of changing hydrological and climatic conditions on the dynamics phosphorus (P) were studied in Northern Adriatic Sea (NA), a coastal system currently affected by these changes. P limitation is one key stresses NA it globally important phenomenon aquatic ecosystems. Therefore, response to stress inducing alkaline phosphatase activity (APA) was characteristic water types NA, formed f...

Journal: :Restoration Ecology 2021

Across the US Coastal Plain, native grasses and legumes may provide viable alternatives to monoculture pastures of introduced sod‐forming grasses, which require recurring costly inputs. Some available cultivars mostly from neighboring regions, have potential combine forage production for grazing livestock with enhanced habitat, especially grassland birds. A few legume species enhance ecosystem ...

2011
Jonas Linderoth

This paper outlines a framework for understanding gameplay from the perspective of ecological psychology. According to this perspective, gameplay can be described in terms of perceiving, acting on and transforming the affordances that are related to a game system or to other players in a game. Challenges in games have an emphasis on perceiving suitable actions and/or performing suitable actions...

پایان نامه :0 1371

in order to examine the ecological conditions and characteristics of fraxinus excelsior l. in the northern forests of iran 6 main areas as well as some miscellaneous ones , have been selected in the region respectively in : lomir2, shafaroud , park - e-noor , ahlam , alandan and noor.

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