Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Indication of urban expansion of Gujranwala city (Pakistan) by remote sensing and GIS

100%

Aziz A., Anwar M. M., Rani M., Ahmad S., Zaheer S.

Environment, Earth and Ecology

|

2019

|

tom 3

|

nr 1

2

Formation of flora and vegetation on the emerging lake bed of the Rakutowskie Lake

84%

Zaluski T., Gawenda-Kempczynska D., Paszek I., Rapacka-Gackowska A.

Ecological Questions

|

2008

|

tom 09

3

Laboratory studies on the effect of heavy metals on the survival and respiratory activity of estuarine neustonic and planktonic bacteria

84%

Mudryk Z., Dwulit M.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

|

2004

|

tom 08

4

Spatial and temporal habitat distribution of spiders in a farmland mosaic

84%

Kozakiewicz M., Merriam G.

Bulletin of the Polish Academy of Sciences. Biological Sciences

|

1995

|

tom 43

|

nr 3-4

5

The influence of clear-cutting on the structure, floral and phytocenotic richness and on ecological processes in a forest ecosystem

84%

Dygus K. H.

Polish Ecological Studies

|

1997

|

tom 23

|

nr 3-4

6

Environmental heterogeneity controls organic-matter dynamics in river-floodplain ecosystems

67%

Langhans S. D., Tiegs S. D., Uehlinger U., Tockner K.

Polish Journal of Ecology

|

2006

|

tom 54

|

nr 4

Environmental heterogeneity is a key regulator of ecological processes. Riverine floodplains are particularly heterogeneous and dynamic systems and loss of their natural environmental heterogeneity and dynamism as a consequence of human impacts constitutes their most serious threat. On river floodplains, flow and flood pulses create a shifting mosaic of channels, ponds, bars, islands, and riparian forest patches. Composition and spatial arrangement of these habitat patches determine their degree of connectivity, which in turn controls the flux of matter and energy among adjacent patches. In light of these attributes, riverine floodplains are model ecosystems for studying the effect of heterogeneity on ecological processes. In this article we introduce a conceptual model for river-floodplain ecosystems that unifies leaf decomposition, organic-matter input, storage and quality, and stresses the importance of the flow and inundation regime. In combining these aspects of organic matter dynamics, which have been treated separately in the ecological literature, this model fosters a more holistic perspective of ecosystem processes on riverine floodplains. We conclude that the linkage between natural heterogeneity and ecosystem processes needs to be considered in future river-floodplain restoration projects.

7

Heath species and heathlands of Italy: an analysis of their relationships under the perspective of climate change based on the description of habitats used for the project "Carta della Natura" (Italian Map of Nature)

59%

Feoli E.

Ecological Questions

|

2010

|

tom 12

The project "Italian Map of Nature" (IMN) is dedicated to create an electronic map (GIS) of the environmental state (quality and vulnerability) of the Italian territory at different scales. Up to now the GIS of IMN is offering maps at a scale 1:50,000. The environmental quality is estimated on the basis of biological description of habitats that can be mapped at this scale, the vulnerability on the basis of variables related to the anthropogenic pressure. In this paper I want to show that the information collected for creating the data base of habitats for mapping purposes may be useful for getting information related to the climatic niche width of the species considered habitat indicators. In this paper I consider the heath species characterizing the IMN habitats of Italy in order to get an indirect estimation of the climatic vulnerability of Italian heathlands. To measure the climatic niche width of the species I propose a formula that combines the number of habitats (they characterize) with the heterogeneity of the habitats according to their distribution in altitudinal belts and in biogeographic regions. The results offer parameters on which to base a discussion for policy conservation of heaths and heathlands in Italy under the perspective of climate change.

Ograniczanie wyników

Indication of urban expansion of Gujranwala city (Pakistan) by remote sensing and GIS

Formation of flora and vegetation on the emerging lake bed of the Rakutowskie Lake

Laboratory studies on the effect of heavy metals on the survival and respiratory activity of estuarine neustonic and planktonic bacteria

Spatial and temporal habitat distribution of spiders in a farmland mosaic

The influence of clear-cutting on the structure, floral and phytocenotic richness and on ecological processes in a forest ecosystem

Environmental heterogeneity controls organic-matter dynamics in river-floodplain ecosystems

Heath species and heathlands of Italy: an analysis of their relationships under the perspective of climate change based on the description of habitats used for the project "Carta della Natura" (Italian Map of Nature)