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Spatial modeling and visualization o...

Konisky, Raymond Anthony.

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Spatial modeling and visualization of habitat response to hydrologic restoration in New England salt marshes.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Spatial modeling and visualization of habitat response to hydrologic restoration in New England salt marshes./
作者:	Konisky, Raymond Anthony.
面頁冊數:	290 p.
附註:	Director: David M. Burdick.
Contained By:	Dissertation Abstracts International64-03B.
標題:	Biology, Botany. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3083734

Spatial modeling and visualization of habitat response to hydrologic restoration in New England salt marshes.
Konisky, Raymond Anthony.

Spatial modeling and visualization of habitat response to hydrologic restoration in New England salt marshes. - 290 p.

Director: David M. Burdick.

Thesis (Ph.D.)--University of New Hampshire, 2003.

Anthropogenic alterations that restrict tidal flows negatively impact 20% of New England salt marshes, but management attempts to restore tides to these sites can be met with unexpected or less than optimal results. Restoration planners may be hindered by a lack of synthesized information regarding important biotic and abiotic factors that determine the distribution of dominant salt marsh plants and invasive species. An ecosystem model was developed to better predict salt marsh habitat response to hydrologic modification as a synthesis of existing models for biomass production, marsh elevation, tidal hydrology, and plant succession. A field experiment was conducted to provide the ecological basis for estimating plant responses to physical stresses and interspecific competition. Six plant species common to New England salt marshes were examined: halophyte species <italic>Spartina alterniflora, Spartina patens</italic>, and <italic>Juncus gerardii</italic>, and brackish invasive species <italic> Phragmites austrahs, Typha angustifolia</italic>, and <italic>Lythrum salicaria </italic>.Subjects--Topical Terms:

1017825
Biology, Botany.

Spatial modeling and visualization of habitat response to hydrologic restoration in New England salt marshes.
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100 1 $a Konisky, Raymond Anthony. $3 1261481
245 1 0 $a Spatial modeling and visualization of habitat response to hydrologic restoration in New England salt marshes.
300 $a 290 p.
500 $a Director: David M. Burdick.
500 $a Source: Dissertation Abstracts International, Volume: 64-03, Section: B, page: 1153.
502 $a Thesis (Ph.D.)--University of New Hampshire, 2003.
520 $a Anthropogenic alterations that restrict tidal flows negatively impact 20% of New England salt marshes, but management attempts to restore tides to these sites can be met with unexpected or less than optimal results. Restoration planners may be hindered by a lack of synthesized information regarding important biotic and abiotic factors that determine the distribution of dominant salt marsh plants and invasive species. An ecosystem model was developed to better predict salt marsh habitat response to hydrologic modification as a synthesis of existing models for biomass production, marsh elevation, tidal hydrology, and plant succession. A field experiment was conducted to provide the ecological basis for estimating plant responses to physical stresses and interspecific competition. Six plant species common to New England salt marshes were examined: halophyte species <italic>Spartina alterniflora, Spartina patens</italic>, and <italic>Juncus gerardii</italic>, and brackish invasive species <italic> Phragmites austrahs, Typha angustifolia</italic>, and <italic>Lythrum salicaria </italic>.
520 $a The model was applied to spatial grids representing marsh area at four salt marsh sites with past or current impacts due to restricted tidal flows. At each site, field data for model parameterization was acquired according to a regional data-collection protocol. To assess model performance, the spatial distribution of marsh plants was predicted using specifications from past hydrologic and ecological conditions at two sites. Aggregated model predictions of halophyte-dominated and invasive-dominated marsh areas were within 4% of observed totals. The model was then run for each of the four study sites to generate 20-year simulations of plant composition changes resulting from current and possible hydrologic scenarios. Scenarios included changes in culvert shape, dimensions, and placement. Model simulations in response to tidally-restricted conditions predicted gradual replacement of halophytes by brackish invasive species, especially <italic>P. australis</italic>. Simulations involving tidal restoration strongly favored halophyte species. Based on spatial model outputs, realistic visualizations of marsh scenario results were designed and rendered. Use of this technology may provide new ways for resource managers to assess potential restoration outcomes, and to communicate the expected results of marsh improvement projects to non-technical audiences.
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650 4 $a Biology, Ecology. $3 1017726
650 4 $a Environmental Sciences. $3 676987
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710 2 0 $a University of New Hampshire. $3 1017788
773 0 $t Dissertation Abstracts International $g 64-03B.
790 $a 0141
790 1 0 $a Burdick, David M., $e advisor
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3083734