An integrated approach to assess broad-scale condition of coastal wetlands—the Gulf of Mexico Coastal Wetlands pilot survey

Nestlerode, Janet A.; Engle, Virginia D.; Bourgeois, Pete; Heitmuller, P. T.; Macauley, John M.; Allen, Yvonne

doi:10.1007/s10661-008-0668-9

Cited by 15 publications

(3 citation statements)

References 15 publications

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“…Recently, Nestlerode et al (2009) calculated the LDI index value for a pilot survey of coastal wetlands in the Gulf of Mexico. Our results show that the ranking of coastal wetlands in Taiwan established by the LDI index were significantly positively correlated with those evaluated by the Taiwanese government based on the criteria of 50% weighting on biodiversity.…”

Section: Discussionmentioning

confidence: 99%

Application of a Landscape Development Intensity Index for Assessing Wetlands in Taiwan

Chen

Lin

2011

Wetlands

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In 2007, the Taiwanese government used the criteria of species richness, degree of wilderness/representativeness/uniqueness, and appropriateness/reasonability to identify 74 wetlands as being of importance. They were ranked according to the order of importance and classified into three levels: wetlands of international, national, and local importance. We examined the landscape status of these wetlands, each including a 100-m-wide swath of surrounding land area and the wetland itself, and calculated landscape development intensity (LDI) index values, as used in earlier assessments in Florida, USA. The LDI index values were ranked and classified into three levels as done by the Taiwanese government. We compared the ranking of the LDI index values with those evaluated by the Taiwanese government and found that there was 67.6% congruency, suggesting that the LDI index can be used to assess the biodiversity status of wetlands. Our results also suggested that the LDI index can be used to assess coastal wetlands. This provides rapid and timely information on landscape development which can prove useful for managing wetlands in Taiwan. However, there was some variability between the two rankings, apparently resulting from the incongruence of some land-use categories used in Florida and Taiwan. It is recommended that Taiwan develop LDI coefficients corresponding to land-use categories based on its own natural and anthropogenic landscapes

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Section: Discussionmentioning

confidence: 99%

Application of a Landscape Development Intensity Index for Assessing Wetlands in Taiwan

Chen

Lin

2011

Wetlands

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“…Wardrop et al (2007a, b), Stevens Jr. and Jensen (2007), Whigham et al (2007), Jacobs et al (2010), and Fennessy et al (2007) describe assessments of wetlands in the Juniata watershed in Pennsylvania, the Nanticoke watershed in Maryland and Delaware, and the Cuyahoga watershed in Ohio. At a larger scale, Nestlerode et al (2009, 2014) report on an assessment of Gulf of Mexico coastal wetlands. Wardrop et al (2013) describe the evolution of monitoring and assessment in the Mid-Atlantic, culminating in an assessment of wetlands in the region.…”

Section: Introductionmentioning

confidence: 99%

Survey design to assess condition of wetlands in the United States

Olsen

Kincaid

Kentula

et al. 2019

Environ Monit Assess

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The US Environmental Protection Agency (US EPA) initiated planning in 2007 and conducted field work in 2011 for the first National Wetland Condition Assessment (NWCA) as part of the National Aquatic Resource Surveys (NARS). It complements the US Fish and Wildlife Service (USFWS) National Wetland Status and Trends (S&T) program that estimates wetland acres nationally. The NWCA used a stratified, unequal probability survey design based on wetland information from S&T plots to select 900 sites for the conterminous 48 states. Based on site evaluation information, the NWCA estimates that there are 94.9 (± 6.20) million acres of wetlands in the NWCA target wetland population (reported in acres to be consistent with S&T). Not all of the estimated target population acres could be sampled due to accessibility and field issues. Based on the sites that could be sampled, the sampled population for the NWCA is estimated to be 62.2 (± 5.28) million acres of wetland area. Landowner denial for access was the main reason (24.7% ± 3.5%) for the sampled population being smaller than the target population, and physical inaccessibility was the second reason (6.8% ± 2.1%). The NWCA 2011 survey design was successful in enabling a national survey for wetland condition to be conducted and coordinated with the USFWS S&T survey of wetland extent. The NWCA 2016 survey design has been modified to address sample frame issues resulting from the difference in S&T focusing only on national estimates and NWCA focusing on national and regional estimates.

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“…Regional and federal agencies such as the United States Environmental Protection Agency (USEPA) have begun to develop rapid assessment protocols to ascertain wetland condition (Mack 2001;Fennessy et al 2007;Wardrop et al 2007;Collins et al 2008;Nestlerode et al 2009). These rapid assessments are based on the condition of the "universal features" that identify wetlands: hydrology, hydric soils, and wetland biotic communities (Fennessy et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Soils-Based Rapid Assessment for Quantifying Changes in Salt Marsh Condition as a Result of Hydrologic Alteration

Twohig

Stolt

2011

Wetlands

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Wetland condition can be severely altered as a result of a change in hydrology. In this study, we examined several soil-based methods to quantify and assess changes in salt marsh condition as a result of tidal restriction. Soil properties were compared between two tidally restricted and two (paired) unrestricted salt marshes. Organic horizon morphology provided a qualitative metric of marsh peat decomposition. Quantitative measures of the degree of decomposition included stable plant fragment content and bearing capacity. Soil pH provided simple metrics of changes in soil chemistry. Bulk density was measured to estimate marsh peat collapse and soil organic matter content provided a measure of carbon dynamics. Neither marsh showed significant differences in soil organic matter or bulk density relative to their paired reference marsh. In contrast, soil pH, stable plant fragment content, and bearing capacity were significantly different between restricted and reference marshes. With the exception of incubation pH, these soil properties can be simply and rapidly measured in the field to quantify physical, chemical, and biological changes in the wetland condition of salt marshes as a result of tidal restriction. Further studies should be conducted to develop a rapid protocol for measuring incubation pH in the field.

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An integrated approach to assess broad-scale condition of coastal wetlands—the Gulf of Mexico Coastal Wetlands pilot survey

Cited by 15 publications

References 15 publications

Application of a Landscape Development Intensity Index for Assessing Wetlands in Taiwan

Application of a Landscape Development Intensity Index for Assessing Wetlands in Taiwan

Survey design to assess condition of wetlands in the United States

Soils-Based Rapid Assessment for Quantifying Changes in Salt Marsh Condition as a Result of Hydrologic Alteration

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