Chapter 12 Natural Environment The State of Our Biodiversity
... Because of the mild climate and a high diversity of plant species in the District, many invertebrates flourished. Although many species are thought to have been lost as a result of habitat loss and predation, a number of endemic species still remain in the region. A staggering 700 species of beetles ...
... Because of the mild climate and a high diversity of plant species in the District, many invertebrates flourished. Although many species are thought to have been lost as a result of habitat loss and predation, a number of endemic species still remain in the region. A staggering 700 species of beetles ...
Competitive abilities of introduced and native grasses
... ability to resist competitive suppression in that vegetation type. The spread of Agropyron into surrounding veg etation may relate to its ability to resist competitive suppression. In the Agropyron-dominated vegetation, neigh boring vegetation suppressed the growth of both species by the same exte ...
... ability to resist competitive suppression in that vegetation type. The spread of Agropyron into surrounding veg etation may relate to its ability to resist competitive suppression. In the Agropyron-dominated vegetation, neigh boring vegetation suppressed the growth of both species by the same exte ...
Death and life of the billabong
... inhabitants which were profoundly affected by the activities of Europeans after settlement of the Basin began in the 1820s. These introductory remarks are necessarily a brief overview of the Murray-Darling Basin. For more detailed information on the Basin, see O'Brien et al. (1983), Walker (1986), M ...
... inhabitants which were profoundly affected by the activities of Europeans after settlement of the Basin began in the 1820s. These introductory remarks are necessarily a brief overview of the Murray-Darling Basin. For more detailed information on the Basin, see O'Brien et al. (1983), Walker (1986), M ...
California Rapid Assessment Method for Wetlands Perennial
... 3) Open water can be a direct source of stress (i.e., water pollution, waves, boat wakes) or an indirect source of stress (i.e., promotes human visitation, encourages intensive use by livestock looking for water, provides dispersal for non-native plant species), or it can be a source of benefits to ...
... 3) Open water can be a direct source of stress (i.e., water pollution, waves, boat wakes) or an indirect source of stress (i.e., promotes human visitation, encourages intensive use by livestock looking for water, provides dispersal for non-native plant species), or it can be a source of benefits to ...
Status of Vegetation Structure and Composition within the Habitat of
... The sampling design was the same used in 2011, and included two groups of sites: (1) sparse vegetation sampling sites (SS sites), and (2) concentrated vegetation sampling sites (CS sites). The 44 SS sites were 500 m to 1 km apart, whereas the 36 CS sites were at the corners of each 250 x 250 m grid ...
... The sampling design was the same used in 2011, and included two groups of sites: (1) sparse vegetation sampling sites (SS sites), and (2) concentrated vegetation sampling sites (CS sites). The 44 SS sites were 500 m to 1 km apart, whereas the 36 CS sites were at the corners of each 250 x 250 m grid ...
IDENTIFYING AND VALUING THE FUNCTIONS OF FLOODPLAINS
... the richness and diversity of wildlife habitats. Floodplains include both aquatic and terrestrial habitats, making them highly productive and diverse ecosystems, often supporting large and diverse populations of plants and animals. For example: ...
... the richness and diversity of wildlife habitats. Floodplains include both aquatic and terrestrial habitats, making them highly productive and diverse ecosystems, often supporting large and diverse populations of plants and animals. For example: ...
The ecology of restoration: historical links, emerging issues and
... need to match local conditions. See also the ÔEcology of ontogenyÕ section in the text. 3. Succession: in many ecosystems, communities tend to recover naturally from natural and anthropogenic disturbances following the removal of these disturbances (see also text). Restoration often consists of assi ...
... need to match local conditions. See also the ÔEcology of ontogenyÕ section in the text. 3. Succession: in many ecosystems, communities tend to recover naturally from natural and anthropogenic disturbances following the removal of these disturbances (see also text). Restoration often consists of assi ...
... volunteer weeds were compared among randomized plots with (1) no restoration, (2) prairie seed addition, and (3) site preparation plus prairie seed addition. After 7 yr, comparison with unrestored sites showed that site preparation plus prairie seed addition had reduced weed biomass by 94%, total we ...
The Effects of Stream Habitat Modification on the Life
... landscape due to deforestation, drainage of wetlands and farmland, grazing, water abstraction, impoundment and the introduction of exotic species have influenced watersheds directly and indirectly in many countries for several millennia (Allan, 1995) and in New Zealand for over 100 years. These chan ...
... landscape due to deforestation, drainage of wetlands and farmland, grazing, water abstraction, impoundment and the introduction of exotic species have influenced watersheds directly and indirectly in many countries for several millennia (Allan, 1995) and in New Zealand for over 100 years. These chan ...
Exam 1 Review Questions
... 7. Describe five different ecological functions of wetlands. 8. What characteristics would make a wetland effective in altering flood flows? In removing pollutants from water? 9. What are aerenchyma, and where and how are they formed? 10. What is the best time to do the construction work for wetland ...
... 7. Describe five different ecological functions of wetlands. 8. What characteristics would make a wetland effective in altering flood flows? In removing pollutants from water? 9. What are aerenchyma, and where and how are they formed? 10. What is the best time to do the construction work for wetland ...
cottonwoods, elk, and wolves in the lamar valley of yellowstone
... along streams and rivers in the American West typically occurs in response to seasonal surface and groundwater regimes, availability of favorable surfaces for germination, and abundant seed sources (Patten 1998, 2000). Thus, variation in flows is central not only to the structuring of the physical e ...
... along streams and rivers in the American West typically occurs in response to seasonal surface and groundwater regimes, availability of favorable surfaces for germination, and abundant seed sources (Patten 1998, 2000). Thus, variation in flows is central not only to the structuring of the physical e ...
Bosque Background
... Riparian forests of the Middle Rio Grande Valley are typically composed of Rio Grande cottonwoods (Populus deltoides subsp. wislizenii), a subspecies of the plains (prairie) cottonwood (Populus deltoides). There has been some confusion in the scientific literature as to the specific identity of Rio ...
... Riparian forests of the Middle Rio Grande Valley are typically composed of Rio Grande cottonwoods (Populus deltoides subsp. wislizenii), a subspecies of the plains (prairie) cottonwood (Populus deltoides). There has been some confusion in the scientific literature as to the specific identity of Rio ...
Exergetic Model of Secondary Successions for Plant Communities in
... Westoby et al. [6] developed a new successional model, originally made for rangelands, though suitable for other ecosystems [7–9]. This is based on the description of a group of discreet vegetation “states” and “transitions” among states. The state changes are triggered by natural events such as fir ...
... Westoby et al. [6] developed a new successional model, originally made for rangelands, though suitable for other ecosystems [7–9]. This is based on the description of a group of discreet vegetation “states” and “transitions” among states. The state changes are triggered by natural events such as fir ...
The SER Primer on Ecological Restoration
... restoration has been degraded, damaged, transformed or entirely destroyed as the direct or indirect result of human activities. In some cases, these impacts to ecosystems have been caused or aggravated by natural agencies such as wildfire, floods, storms, or volcanic eruption, to the point at which ...
... restoration has been degraded, damaged, transformed or entirely destroyed as the direct or indirect result of human activities. In some cases, these impacts to ecosystems have been caused or aggravated by natural agencies such as wildfire, floods, storms, or volcanic eruption, to the point at which ...
Beavers and biodiversity: the ethics of ecological restoration
... rehabilitation and reclamation. Definitions of these terms vary, and the differences between them are often not entirely clear. Rehabilitation may defined as encompassing “a range of options which do not aim at exact fidelity to a predisturbance system” (Throop, 2000: 13). However, the functioning a ...
... rehabilitation and reclamation. Definitions of these terms vary, and the differences between them are often not entirely clear. Rehabilitation may defined as encompassing “a range of options which do not aim at exact fidelity to a predisturbance system” (Throop, 2000: 13). However, the functioning a ...
Ecological Inventory of Queensborough, City of New Westminster
... foreshore of tidal marsh and mudflats along the south shore of Queensborough. The marsh type is classified as Lyngby’s Sedge Herbaceous Vegetation, an ecological community that is provincially rare and ranked as Vulnerable (S3) in B.C. (BC CDC, 2009). There was a high diversity of native plant sp ...
... foreshore of tidal marsh and mudflats along the south shore of Queensborough. The marsh type is classified as Lyngby’s Sedge Herbaceous Vegetation, an ecological community that is provincially rare and ranked as Vulnerable (S3) in B.C. (BC CDC, 2009). There was a high diversity of native plant sp ...
260 KB - Hawaii Biological Survey
... seasonal variation, and the smaller, steeper overall stream system. These structural differences in Hawaiian streams directly influence mechanistic factors impacting stream biota. Not the least of these factors include nutrient regimes, flow regimes, and residence time. The minimized hyporheic zone ...
... seasonal variation, and the smaller, steeper overall stream system. These structural differences in Hawaiian streams directly influence mechanistic factors impacting stream biota. Not the least of these factors include nutrient regimes, flow regimes, and residence time. The minimized hyporheic zone ...
appendix w5 - Department of Water Affairs
... Marginal/Low rating=1; The floodplain falls within a Municipal nature reserve or some other category of protected status that reflects its importance for the conservation of ecological diversity a local scale. Very low rating=0; The floodplain does not fall within any category of protected status th ...
... Marginal/Low rating=1; The floodplain falls within a Municipal nature reserve or some other category of protected status that reflects its importance for the conservation of ecological diversity a local scale. Very low rating=0; The floodplain does not fall within any category of protected status th ...
Biological Resources
... 4.6-3 shows the extent of major wetland, river, and stream systems. The CNDDB information has been simplified to distinguish the occurrence record as either a plant or animal, rather than identifying each species by name. Exhibit 4.6-4 provides a list of the 42 animal species and 86 plant species re ...
... 4.6-3 shows the extent of major wetland, river, and stream systems. The CNDDB information has been simplified to distinguish the occurrence record as either a plant or animal, rather than identifying each species by name. Exhibit 4.6-4 provides a list of the 42 animal species and 86 plant species re ...
515.pdf
... suggests grazing increases biodiversity. This was the case, but this may not be satisfactory to all management objectives since in some plant communities there was an increase of plant species that tend to be more suited to disturbed areas. In some other areas, there was essentially no difference in ...
... suggests grazing increases biodiversity. This was the case, but this may not be satisfactory to all management objectives since in some plant communities there was an increase of plant species that tend to be more suited to disturbed areas. In some other areas, there was essentially no difference in ...
Approximating Nature`s Variation: Selecting and Using Reference
... Spatial context is the relationship of sites, be they reference sites or sites to be restored, to their surroundings. Spatial context includes the nature of the matrix surrounding sites, the nature of edges and boundaries, and the size, distribution, and isolation of the sites themselves. Spatial co ...
... Spatial context is the relationship of sites, be they reference sites or sites to be restored, to their surroundings. Spatial context includes the nature of the matrix surrounding sites, the nature of edges and boundaries, and the size, distribution, and isolation of the sites themselves. Spatial co ...
Gravel-bed river floodplains are the ecological nexus of glaciated
... floor may be either filled with water, creating a lake, or filled with glacial and alluvial sediments, creating a gravel-bed floodplain. Often, these hydrogeomorphic domains will alternate and reappear several times as a river makes its way down the valley (11). Rivers in canyons support comparative ...
... floor may be either filled with water, creating a lake, or filled with glacial and alluvial sediments, creating a gravel-bed floodplain. Often, these hydrogeomorphic domains will alternate and reappear several times as a river makes its way down the valley (11). Rivers in canyons support comparative ...
Managing the high ecological Value aquatic ecosysteMs
... Its irregular “boom and bust” cycles of bounteous floods and difficult droughts have become embedded in the national psyche as something typically Australian. The Cooper Creek’s significance extends well beyond national boundaries. With its unregulated flow regime and minimal levels of water extract ...
... Its irregular “boom and bust” cycles of bounteous floods and difficult droughts have become embedded in the national psyche as something typically Australian. The Cooper Creek’s significance extends well beyond national boundaries. With its unregulated flow regime and minimal levels of water extract ...
22_lpp05_yran
... The loss of areas of remnant vegetation also leads to the decline of natural ecological systems through the loss of wildlife habitat and depletion of the genetic diversity in plants and animals. Remnant vegetation areas are sensitive to disturbance through indiscriminate and incremental clearing whi ...
... The loss of areas of remnant vegetation also leads to the decline of natural ecological systems through the loss of wildlife habitat and depletion of the genetic diversity in plants and animals. Remnant vegetation areas are sensitive to disturbance through indiscriminate and incremental clearing whi ...
Stony Rises Landholder Guide
... Rises has changed from what early settlers first observed almost 200 years ago. ...
... Rises has changed from what early settlers first observed almost 200 years ago. ...
Riparian-zone restoration
Riparian-zone restoration is the ecological restoration of riparian-zone habitats of streams, rivers, springs, lakes, floodplains, and other hydrologic ecologies. A riparian zone or riparian area is the interface between land and a river or stream. Riparian is also the proper nomenclature for one of the fifteen terrestrial biomes of the earth; the habitats of plant and animal communities along the margins and river banks are called riparian vegetation, characterized by Aquatic plants and animals that favor them. Riparian zones are significant in ecology, environmental management, and civil engineering because of their role in soil conservation, their habitat biodiversity, and the influence they have on fauna and aquatic ecosystems, including grassland, woodland, wetland or sub-surface features such as water tables. In some regions the terms riparian woodland, riparian forest, riparian buffer zone, or riparian strip are used to characterize a riparian zone.The need for Riparian-zone restoration has come about because riparian zones have been degraded throughout much of the world by the activities of mankind affecting natural geologic forces. The unique biodiversity of riparian ecosystems and the importance of riparian zones in preventing erosion, protecting water quality, providing habitat and wildlife corridors, and maintaining the health of in-stream biota (Aquatic organisms) has led to a surge of restoration activities aimed at riparian ecosystems in the last few decades. Restoration efforts are typically guided by an ecological understanding of riparian-zone processes and knowledge of the causes of degradation. They are often interdependent with stream restoration projects.