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You searched for: Journal Urban ecosystems Remove constraint Journal: Urban ecosystems Publication Year 2008 Remove constraint Publication Year: 2008 Source 2008 v.11 no.2 Remove constraint Source: 2008 v.11 no.2
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1. Distribution and activity of bats at local and landscape scales within a rural-urban gradient

Author:
Johnson, Joshua B.; Gates, J. Edward; Ford, W. Mark
Source:
Urban ecosystems 2008 v.11 no.2 pp. 227-242
ISSN:
1083-8155
Subject:
Eptesicus fuscus; Myotis lucifugus; Myotis septentrionalis; National Park Service; acoustics; coastal plains; detectors; ecosystems; forests; habitat fragmentation; habitats; landscapes; parks; piedmont; snags; traps; trees; urban areas; urbanization; District of Columbia; Maryland; Virginia; West Virginia
Abstract:
... We examined the relationship between bat species activity and composition and the extent of forest cover and urbanization in and adjacent to 11 U.S. National Park Service, National Capital Region Parks in Maryland, Virginia, West Virginia, and Washington, D.C., from 2003-2004, using mist nets, harp traps, acoustical detectors, and visual observations in a variety of habitats. Our efforts included ...
DOI:
10.1007/s11252-008-0055-x

2. Effects of urbanization on species richness: A review of plants and animals

Author:
McKinney, Michael L.
Source:
Urban ecosystems 2008 v.11 no.2 pp. 161-176
ISSN:
1083-8155
Subject:
amphibians; birds; ecosystems; introduced species; invertebrates; mammals; plants (botany); reptiles; species diversity; suburban areas; urban areas; urbanization
Abstract:
... Many studies have described the effects of urbanization on species richness. These studies indicate that urbanization can increase or decrease species richness, depending on several variables. Some of these variables include: taxonomic group, spatial scale of analysis, and intensity of urbanization. Recent reviews of birds (the most-studied group) indicate that species richness decreases with incr ...
DOI:
10.1007/s11252-007-0045-4

3. Identifying habitat sinks: a case study of Cooper's hawks in an urban environment

Author:
Mannan, R. William; Steidl, Robert J.; Boal, Clint W.
Source:
Urban ecosystems 2008 v.11 no.2 pp. 141-148
ISSN:
1083-8155
Subject:
Accipiter; breeding; case studies; ecological traps; ecosystems; hawks; monitoring; mortality; nestlings; urban areas; Arizona
Abstract:
... We studied a population of Cooper's hawks (Accipiter cooperii) in Tucson, Arizona from 1994 to 2005. High rates of mortality of nestlings from an urban-related disease prompted speculation that the area represented an ecological trap and habitat sink for Cooper's hawks. In this paper, we used estimates of survival and productivity from 11years of monitoring to develop an estimate of the rate of po ...
DOI:
10.1007/s11252-008-0056-9

4. Management regimes affect woody plant productivity and water use efficiency in an urban desert ecosystem

Author:
Stabler, L. Brooke
Source:
Urban ecosystems 2008 v.11 no.2 pp. 197-211
ISSN:
1083-8155
Subject:
aboveground biomass; biomass production; canopy; carbon; ecosystems; gas exchange; irrigation rates; leaf area; models; monitoring; plant density; pruning; shrubs; surveys; urban areas; water use efficiency; woody plants; xerophytes; Arizona
Abstract:
... Woody plant productivity and water use were evaluated under various management regimes in the Central Arizona Phoenix Long Term Ecological Research study area during 1999-2003. Management was defined as alteration of plant density, irrigation of plants, and removal of plant biomass via pruning. In a ground survey of 204 randomly chosen sites woody plant canopy area (CA) was higher in developed plo ...
DOI:
10.1007/s11252-008-0050-2

5. Movement and habitat use of two aquatic turtles (Graptemys geographica and Trachemys scripta) in an urban landscape

Author:
Ryan, Travis J.; Conner, Christopher A.; Douthitt, Brooke A.; Sterrett, Sean C.; Salsbury, Carmen M.
Source:
Urban ecosystems 2008 v.11 no.2 pp. 213-225
ISSN:
1083-8155
Subject:
Trachemys scripta; ecosystems; females; habitat preferences; habitats; hibernation; highlands; humans; landscapes; males; radio telemetry; rivers; turtles; urban areas; urbanization; woodlands; Indiana
Abstract:
... Our study focuses on the spatial ecology and seasonal habitat use of two aquatic turtles in order to understand the manner in which upland habitat use by humans shapes the aquatic activity, movement, and habitat selection of these species in an urban setting. We used radiotelemetry to follow 15 female Graptemys geographica (common map turtle) and each of ten male and female Trachemys scripta (red- ...
DOI:
10.1007/s11252-008-0049-8

6. The energy and mass balance of Los Angeles County

Author:
Ngo, N. S.; Pataki, D. E.
Source:
Urban ecosystems 2008 v.11 no.2 pp. 121-139
ISSN:
1083-8155
Subject:
energy accounting; environmental impact; foods; greenhouse gas emissions; groundwater recharge; pollutants; population density; population growth; public policy; runoff; semiarid zones; urban areas; wastewater; United States
Abstract:
... We conducted an urban “metabolic” study of inputs and outputs of food, water, energy, and pollutants from Los Angeles County, USA. This region has been the subject of recent debate about the nature of population density and distribution as it relates to urban form and associated environmental impacts. We found that with the exception of food imports and wastewater outputs, inputs of resources and ...
DOI:
10.1007/s11252-008-0051-1

7. The importance of traffic corridors as urban habitats for plants in Finland

Author:
Ranta, Pertti
Source:
Urban ecosystems 2008 v.11 no.2 pp. 149-159
ISSN:
1083-8155
Subject:
case studies; cities; endangered species; habitats; traffic; vascular plants; Finland
Abstract:
... Traffic corridors have been recognized as floristically rich with endangered and rare species included. The aim of this study is to treat traffic corridors as habitats and estimate their importance for diversity of vascular plants on municipal level. The material is derived from the comprehensive studies of urban floras in the cities of Vantaa, Kerava and Järvenpää during the 1990s in southern Fin ...
DOI:
10.1007/s11252-008-0058-7