Levels of Ecological Organization in Freshwater Systems Population
... Abiotic controls on life history Broader implications Mediates exposure to other factors (e.g., predators) Regulates how closely a population can track resources Affects the rate at which populations can respond to natural selection ...
... Abiotic controls on life history Broader implications Mediates exposure to other factors (e.g., predators) Regulates how closely a population can track resources Affects the rate at which populations can respond to natural selection ...
Fresh Water Habitats and Biodiversity (Edexcel AS)
... Still freshwater ecosystems – ponds and lakes – are referred to as lentic ecosystems. Moving freshwater ecosystems – streams and rivers – are referred to as lotic ecosystems. Both present the invertebrates occupying these ecosystems with a range of limiting factors which must be overcome through ada ...
... Still freshwater ecosystems – ponds and lakes – are referred to as lentic ecosystems. Moving freshwater ecosystems – streams and rivers – are referred to as lotic ecosystems. Both present the invertebrates occupying these ecosystems with a range of limiting factors which must be overcome through ada ...
Droughtinduced woody plant mortality in an encroached semiarid
... occurring climatic extremes, it will become increasingly important to understand, predict and plan for major shifts in vegetation (IPCC 2007). Many regional planners rely on predictive climate models, such as species biometric climate models and dynamic global vegetation models (DGVMs), as the basis ...
... occurring climatic extremes, it will become increasingly important to understand, predict and plan for major shifts in vegetation (IPCC 2007). Many regional planners rely on predictive climate models, such as species biometric climate models and dynamic global vegetation models (DGVMs), as the basis ...
22 Landscape Ecol 2009-2
... What are effects of fragmentation on landscape pattern? • Total amount of habitat…. • Number of habitat patches… • Amount of edge habitat… • Average patch size… • Patch isolation… ...
... What are effects of fragmentation on landscape pattern? • Total amount of habitat…. • Number of habitat patches… • Amount of edge habitat… • Average patch size… • Patch isolation… ...
Competition Powerpoint
... Consequently, managing an ecosystem for high biodiversity may require periodic or spatially-patchy disturbances ...
... Consequently, managing an ecosystem for high biodiversity may require periodic or spatially-patchy disturbances ...
The Disturbing History of Intermediate Disturbance David M
... similar relationship with disturbance. Grime (1973a) provides the earliest graph linking disturbance and species richness that I am aware off, five years before Connell. He reprinted this graphical model in a paper in the Journal of Encironmental Management published in the same year as the Nature p ...
... similar relationship with disturbance. Grime (1973a) provides the earliest graph linking disturbance and species richness that I am aware off, five years before Connell. He reprinted this graphical model in a paper in the Journal of Encironmental Management published in the same year as the Nature p ...
Succession
... • Secondary succession, however, occurs in areas that still have land containing nutrients in the soil.- Not completely starting from scratch, like primary. ...
... • Secondary succession, however, occurs in areas that still have land containing nutrients in the soil.- Not completely starting from scratch, like primary. ...
The effects of disturbance on trophic levels, food webs
... abundance along the burned edge had remained constant. Post‐fire herbivory may have life‐long effects on plant fitness and population dynamics, since fire causes temporary reductions in populations of herbivorous insects during a critical period in plant growth. Plants may grow faster after a burn ...
... abundance along the burned edge had remained constant. Post‐fire herbivory may have life‐long effects on plant fitness and population dynamics, since fire causes temporary reductions in populations of herbivorous insects during a critical period in plant growth. Plants may grow faster after a burn ...
arctic refuge - Audubon Alaska
... Birds can be sensitive indicators of environmental change. One of the weaknesses of research on the impacts of oil development at Prudhoe Bay and in associated fields in the central Arctic is that much of this work was designed to ask site-specific questions about the impacts of particular developme ...
... Birds can be sensitive indicators of environmental change. One of the weaknesses of research on the impacts of oil development at Prudhoe Bay and in associated fields in the central Arctic is that much of this work was designed to ask site-specific questions about the impacts of particular developme ...
Sample pages 2 PDF
... of interest. In an all-encompassing view, a disturbance may still be defined as a biotic or abiotic, natural or man-made process that can destabilize the natural systems at any hierarchical level (see Hobbs and Huenneke 1992). According to another definition, a disturbance is an ecological process abl ...
... of interest. In an all-encompassing view, a disturbance may still be defined as a biotic or abiotic, natural or man-made process that can destabilize the natural systems at any hierarchical level (see Hobbs and Huenneke 1992). According to another definition, a disturbance is an ecological process abl ...
Biotic and Abiotic Factors
... – At other times, change occurs as a more gradual response to natural fluctuations in the environment. ...
... – At other times, change occurs as a more gradual response to natural fluctuations in the environment. ...
Biological Objectives: Definition of Terms October 21, 2010 Draft Regulatory Scope Definitions
... Wadeable stream – a stream that can be crossed safely by wading during an index period. Perennial stream – a stream with the year‐round presence of flowing surface water during a typical water year. Any stream that does not meet this definition is considered “non‐perennial” ...
... Wadeable stream – a stream that can be crossed safely by wading during an index period. Perennial stream – a stream with the year‐round presence of flowing surface water during a typical water year. Any stream that does not meet this definition is considered “non‐perennial” ...
Lower Columbia River Limiting Factors (Metrics?) Total = 64
... 7. Altered magnitude of flows (decreased low flows, increased peak flows), 8. Alterations to the duration of flow events, 9. Alterations to the rate of change of flow, 10. Alterations to the natural temporal pattern of stream flow, 11. Channel de‐watering, 12. Lack of channel forming flows, 13. Disr ...
... 7. Altered magnitude of flows (decreased low flows, increased peak flows), 8. Alterations to the duration of flow events, 9. Alterations to the rate of change of flow, 10. Alterations to the natural temporal pattern of stream flow, 11. Channel de‐watering, 12. Lack of channel forming flows, 13. Disr ...
Andow et al 1990
... landscapes that vary with dispersal ability. Good dispersers less influenced by fragmentation ...
... landscapes that vary with dispersal ability. Good dispersers less influenced by fragmentation ...
Coastal Disturbance Study Presentation
... As it is hard to collect, there is little evidence of disturbance’s impact Effects of human disturbance do not necessarily lead to population impact There is greater significance, however, for populations from disturbance impact on every breeding stage than from mortality rates for non-breedin ...
... As it is hard to collect, there is little evidence of disturbance’s impact Effects of human disturbance do not necessarily lead to population impact There is greater significance, however, for populations from disturbance impact on every breeding stage than from mortality rates for non-breedin ...
SSP Models and Strategic Habitat Conservation Presentation
... Partnership for coordinated management in time and space Shift from few to many species and habitats ...
... Partnership for coordinated management in time and space Shift from few to many species and habitats ...
Biotic and Abiotic Influences on Ecosystems
... • As a population grows, it requires more food, water, and space • Eventually, it will reach its carrying capacity – the maximum population size of a species that a given ecosystem can sustain • As abiotic and biotic factors change, the carrying capacity also changes – E.g. A forest fire reduces the ...
... • As a population grows, it requires more food, water, and space • Eventually, it will reach its carrying capacity – the maximum population size of a species that a given ecosystem can sustain • As abiotic and biotic factors change, the carrying capacity also changes – E.g. A forest fire reduces the ...
Lecture 11 Interspecific Interactions
... • Song birds mob and harass predator bird species • Avoidance – temporal, spatial • Refuges ...
... • Song birds mob and harass predator bird species • Avoidance – temporal, spatial • Refuges ...
DR on Adoption of Guidance and Definitions Rev1
... may reduce numbers in a locality on a continuing basis. Thirdly, it may have adverse ecological impacts on the birds involved through changes to mortality or productivity. For significant disturbance to occur, any one of these three conditions must be met. b. Reference to ‘species’ throughout this g ...
... may reduce numbers in a locality on a continuing basis. Thirdly, it may have adverse ecological impacts on the birds involved through changes to mortality or productivity. For significant disturbance to occur, any one of these three conditions must be met. b. Reference to ‘species’ throughout this g ...
The Intertidal Zone Zones Rocky Intertidal Rocky shores
... • A very small scale disturbance in a mussel bed might just result in the mussels moving and sealing off the opened patch • Larger patches might be colonized by other species and the patch might last many months or even indefinitely • Therefore, spatial scale of disturbance might affect the spatial ...
... • A very small scale disturbance in a mussel bed might just result in the mussels moving and sealing off the opened patch • Larger patches might be colonized by other species and the patch might last many months or even indefinitely • Therefore, spatial scale of disturbance might affect the spatial ...
Chapter 6 Synth usions and recommendations
... deterministically would produce a sustained yield. The impact of environmental stochasticity may lead to extinction irrespective the size of the population. It therefore constitutes an important risk for population decline, in all populations regardless of their abundance at a given location. Becaus ...
... deterministically would produce a sustained yield. The impact of environmental stochasticity may lead to extinction irrespective the size of the population. It therefore constitutes an important risk for population decline, in all populations regardless of their abundance at a given location. Becaus ...
V) Maintenance of species diversity
... D) Models of succession: (Connell and Slatyer 1977 American Naturalist) i) Facilitation: early species modify the environment… - make it more suitable for later species - later species can’t colonize until environment modified - modified environment is often not so good for early species and they ar ...
... D) Models of succession: (Connell and Slatyer 1977 American Naturalist) i) Facilitation: early species modify the environment… - make it more suitable for later species - later species can’t colonize until environment modified - modified environment is often not so good for early species and they ar ...
Author template for journal articles
... a. Anticipatory Strategy: Identify alternative habitats that could provide suitable ...
... a. Anticipatory Strategy: Identify alternative habitats that could provide suitable ...