![Effect of grazing on net primary production of a Mongolian grassland](http://s1.studyres.com/store/data/020715724_1-52b814452f8e4a08fc135d505fc8fb35-300x300.png)
Effect of grazing on net primary production of a Mongolian grassland
... Mongolia is located on northeastern Asia, where ecotone (forest-grassland-desert) is formed because of climatic shift from humid condition to arid condition. An ecotone is a sensitive transitional area between two adjacent ecological communities and generally sensitive to external disturbance (clima ...
... Mongolia is located on northeastern Asia, where ecotone (forest-grassland-desert) is formed because of climatic shift from humid condition to arid condition. An ecotone is a sensitive transitional area between two adjacent ecological communities and generally sensitive to external disturbance (clima ...
Ecological Succession
... the broken soil will rapidly invade the site and will become quickly and densely established. These invading plants are what we call "weeds“ in which we consider a nuisance or invaders. ...
... the broken soil will rapidly invade the site and will become quickly and densely established. These invading plants are what we call "weeds“ in which we consider a nuisance or invaders. ...
Proposed structure of synthese paper
... Stresses, such as climate change, the recent global financial crisis or globalization, ...
... Stresses, such as climate change, the recent global financial crisis or globalization, ...
RG report
... wolverine, whose fragmented range is now limited to central and northern Fennoscandia, is generally labelled as vulnerable, but with distinct populations at the risk of extinction. Investigating the role wolverines have in ecosystem dynamics and their adaptation to ecosystem changes are important to ...
... wolverine, whose fragmented range is now limited to central and northern Fennoscandia, is generally labelled as vulnerable, but with distinct populations at the risk of extinction. Investigating the role wolverines have in ecosystem dynamics and their adaptation to ecosystem changes are important to ...
Community-wide distribution of predator–prey interaction strength in
... the fact that herbivores in experimental feeding trials were offered only a single-species prey resource, were consistent with our goal of estimating maximum per capita interaction strength for each species in the analyses. Finally, we estimated potential population interaction strengths for each he ...
... the fact that herbivores in experimental feeding trials were offered only a single-species prey resource, were consistent with our goal of estimating maximum per capita interaction strength for each species in the analyses. Finally, we estimated potential population interaction strengths for each he ...
Impact of Climate Change on Biodiversity and Community
... Climate change can have significant negative impacts on the natural environment including the loss of biodiversity and changes in ecosystems. In developing countries with a greater dependence on natural resource based livelihoods, this can impact the socio-economic status of communities, hamper prog ...
... Climate change can have significant negative impacts on the natural environment including the loss of biodiversity and changes in ecosystems. In developing countries with a greater dependence on natural resource based livelihoods, this can impact the socio-economic status of communities, hamper prog ...
Action Statement
... several threats to this population. The species relies on subterranean micro-environments, and any serious disturbance to the soil structure, by processes such as cultivation or excessive trampling by stock, may eliminate it from an area. Weed invasion may modify vegetation structure to the detrimen ...
... several threats to this population. The species relies on subterranean micro-environments, and any serious disturbance to the soil structure, by processes such as cultivation or excessive trampling by stock, may eliminate it from an area. Weed invasion may modify vegetation structure to the detrimen ...
Hooded Scaly-foot (Pygopus nigriceps)
... several threats to this population. The species relies on subterranean micro-environments, and any serious disturbance to the soil structure, by processes such as cultivation or excessive trampling by stock, may eliminate it from an area. Weed invasion may modify vegetation structure to the detrimen ...
... several threats to this population. The species relies on subterranean micro-environments, and any serious disturbance to the soil structure, by processes such as cultivation or excessive trampling by stock, may eliminate it from an area. Weed invasion may modify vegetation structure to the detrimen ...
Slide 1
... How does natural environmental change affect ecosystem stability? 1. Fires, heavy storms, and natural climate change can cause major changes in local populations of plants and animals. 2. A decline in natural biodiversity can make an ecosystem less stable. ...
... How does natural environmental change affect ecosystem stability? 1. Fires, heavy storms, and natural climate change can cause major changes in local populations of plants and animals. 2. A decline in natural biodiversity can make an ecosystem less stable. ...
Animating the Carbon Cycle
... The boreal forest biome is a reservoir for 30% of terrestrial carbon (Houghton and others 2009; Pan and others 2011). Both vertebrate and invertebrate species within these systems may be instrumental drivers of biogeochemical processes (Pastor and others 1988; Dymond and others 2010). The moose is a ...
... The boreal forest biome is a reservoir for 30% of terrestrial carbon (Houghton and others 2009; Pan and others 2011). Both vertebrate and invertebrate species within these systems may be instrumental drivers of biogeochemical processes (Pastor and others 1988; Dymond and others 2010). The moose is a ...
Livestock Methane and Climate Change: Recent Advances in Methane Estimation and Amelioration Strategies
... stake holders by well trained and experienced scientists. For detailed information about the institute please visit our website www.nianp.res.in ...
... stake holders by well trained and experienced scientists. For detailed information about the institute please visit our website www.nianp.res.in ...
Climate variability, ecological gradient and the Northeast China
... The NECT comprises three grassland types: desert steppe, typical steppe and meadow steppe from west to east along the western and central NECT (Fig. 2(a, b)). The distribution of grassland types is almost completely determined by the climatic gradients, especially precipitation. The desert steppe (s ...
... The NECT comprises three grassland types: desert steppe, typical steppe and meadow steppe from west to east along the western and central NECT (Fig. 2(a, b)). The distribution of grassland types is almost completely determined by the climatic gradients, especially precipitation. The desert steppe (s ...
Status and Ecological Effects of the World’s Largest Carnivores
... require large prey and expansive habitats. These food requirements and wide-ranging behavior often bring them into conflict with humans and livestock. This, in addition to human intolerance, renders them vulnerable to extinction. Large carnivores face enormous threats that have caused massive decline ...
... require large prey and expansive habitats. These food requirements and wide-ranging behavior often bring them into conflict with humans and livestock. This, in addition to human intolerance, renders them vulnerable to extinction. Large carnivores face enormous threats that have caused massive decline ...
Status and Ecological Effects of the World`s Largest Carnivores
... require large prey and expansive habitats. These food requirements and wide-ranging behavior often bring them into conflict with humans and livestock. This, in addition to human intolerance, renders them vulnerable to extinction. Large carnivores face enormous threats that have caused massive decline ...
... require large prey and expansive habitats. These food requirements and wide-ranging behavior often bring them into conflict with humans and livestock. This, in addition to human intolerance, renders them vulnerable to extinction. Large carnivores face enormous threats that have caused massive decline ...
Status and Ecological Effects of the World`s Largest Carnivores
... require large prey and expansive habitats. These food requirements and wide-ranging behavior often bring them into conflict with humans and livestock. This, in addition to human intolerance, renders them vulnerable to extinction. Large carnivores face enormous threats that have caused massive declin ...
... require large prey and expansive habitats. These food requirements and wide-ranging behavior often bring them into conflict with humans and livestock. This, in addition to human intolerance, renders them vulnerable to extinction. Large carnivores face enormous threats that have caused massive declin ...
Invasive Plants and Wildlife Habitat Conservation Planning in an Era of
... are described as semidesert grasslands (Brown 1994). Desert grasslands are the most arid and least productive of all North American grasslands, with mean annual temperatures ranging between 138 C and 168 C and receiving only 200–400 mm of precipitation, which falls typically in a bimodal pattern of ...
... are described as semidesert grasslands (Brown 1994). Desert grasslands are the most arid and least productive of all North American grasslands, with mean annual temperatures ranging between 138 C and 168 C and receiving only 200–400 mm of precipitation, which falls typically in a bimodal pattern of ...
Temperature and trophic structure are driving microbial productivity
... Temperature is known to influence ecosystem processes through its direct effect on biological rates such as respiration and nutrient cycling. These changes can then indirectly affect ecologically processes by altering trophic dynamics, the persistence of a species in a given environment, and, consequen ...
... Temperature is known to influence ecosystem processes through its direct effect on biological rates such as respiration and nutrient cycling. These changes can then indirectly affect ecologically processes by altering trophic dynamics, the persistence of a species in a given environment, and, consequen ...
Human survivorship curves. Most modern curves are
... explosion (much like what happened later with reindeer populations on the Pribilof Islands; see previous notes), in part, to lack of predators. There was an attempt, in the 1940s, to introduce wolves to the island, in the hope that death rates among moose would be increased enough to lead to populat ...
... explosion (much like what happened later with reindeer populations on the Pribilof Islands; see previous notes), in part, to lack of predators. There was an attempt, in the 1940s, to introduce wolves to the island, in the hope that death rates among moose would be increased enough to lead to populat ...
Ground surface temperature scenarios in complex high
... Ohmura, 1997]. For steep rock walls, turbulent latent heat flux was reduced by a factor of 100 because of the assumed lack of snow cover and surface water. Vapor pressure is parameterized using methods described by Flatau et al. [1992] and Plüss [1997]. Latent and sensible turbulent fluxes were cal ...
... Ohmura, 1997]. For steep rock walls, turbulent latent heat flux was reduced by a factor of 100 because of the assumed lack of snow cover and surface water. Vapor pressure is parameterized using methods described by Flatau et al. [1992] and Plüss [1997]. Latent and sensible turbulent fluxes were cal ...
Relationships between ecological interaction modifications and
... compensatory responses that plants exhibit following herbivore damage, however, makes it likely that using damage as a proxy for herbivore density will only be valid over very short time frames. We encourage community and evolutionary ecologists to pursue alternative methods for manipulating the den ...
... compensatory responses that plants exhibit following herbivore damage, however, makes it likely that using damage as a proxy for herbivore density will only be valid over very short time frames. We encourage community and evolutionary ecologists to pursue alternative methods for manipulating the den ...
Foraging behaviour and diet of an ectothermic herbivore: Testudo
... Foraging when time is limited The extreme continental climate of central Asia (hot and dry summer followed by a very cold winter) limits steppe tortoise activity to the spring only, three months a year on average (Lagarde et al. 1999 and references therein). During such a limited time period, the to ...
... Foraging when time is limited The extreme continental climate of central Asia (hot and dry summer followed by a very cold winter) limits steppe tortoise activity to the spring only, three months a year on average (Lagarde et al. 1999 and references therein). During such a limited time period, the to ...
Foraging behaviour and diet of an ectothermic herbivore: Testudo
... Foraging when time is limited The extreme continental climate of central Asia (hot and dry summer followed by a very cold winter) limits steppe tortoise activity to the spring only, three months a year on average (Lagarde et al. 1999 and references therein). During such a limited time period, the to ...
... Foraging when time is limited The extreme continental climate of central Asia (hot and dry summer followed by a very cold winter) limits steppe tortoise activity to the spring only, three months a year on average (Lagarde et al. 1999 and references therein). During such a limited time period, the to ...
Does natural selection organize ecosystems for the maintenance of
... et al. 1994). Moreover, ‘edge effects’ in these natural fragments are minimal, compared with those in fragments recently isolated by human activity. Newly arrived human hunters with stone-tipped weapons killed off Beringia’s mammoths and other megaherbivores at the end of the Pleistocene, inducing a ...
... et al. 1994). Moreover, ‘edge effects’ in these natural fragments are minimal, compared with those in fragments recently isolated by human activity. Newly arrived human hunters with stone-tipped weapons killed off Beringia’s mammoths and other megaherbivores at the end of the Pleistocene, inducing a ...
Plant–herbivore–decomposer stoichiometric mismatches and
... Although major advances on this topic have been made in some ecosystems, such as boreal forests [7], the Serengeti grasslands [8] and temperate managed pastures [9], the impacts of herbivores on nutrient cycling are generally hard to predict in the absence of detailed, long-term experimental manipul ...
... Although major advances on this topic have been made in some ecosystems, such as boreal forests [7], the Serengeti grasslands [8] and temperate managed pastures [9], the impacts of herbivores on nutrient cycling are generally hard to predict in the absence of detailed, long-term experimental manipul ...
Pleistocene Park
![](https://commons.wikimedia.org/wiki/Special:FilePath/Ice_age_fauna_of_northern_Spain_-_Mauricio_Antón.jpg?width=300)
Pleistocene Park (Russian: Плейстоценовый парк) is a nature reserve on the Kolyma River south of Chersky in the Sakha Republic, Russia, in northeastern Siberia, where an attempt is being made to recreate the northern subarctic steppe grassland ecosystem that flourished in the area during the last glacial period.The project is being led by Russian researcher Sergey Zimov, with hopes to back the hypothesis that overhunting, and not climate change, was primarily responsible for the extinction of wildlife and the disappearance of the grasslands at the end of the Pleistocene epoch.A further aim is to research the climatic effects of the expected changes in the ecosystem. Here the hypothesis is that the change from tundra to grassland will result in a raised ratio of energy emission to energy absorption of the area, leading to less thawing of permafrost and thereby less emission of greenhouse gases.To study this, large herbivores have been released, and their effect on the local fauna is being monitored. Preliminary results point at the ecologically low-grade tundra biome being converted into a productive grassland biome, and at the energy emission of the area being raised.A documentary is being produced about the park by an American journalist and filmmaker.