Genetic structure of natural and restored shoalgrass Halodule wrightii populations in the NW Gulf of Mexico

Travis, Steven E.; Sheridan, Peter F.

doi:10.3354/meps322117

Cited by 15 publications

(5 citation statements)

References 53 publications

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“…Genetic diversity contributes to the resiliency of populations by affecting their ability to adapt to abiotic and biotic stressors and to disturbance. The importance of maintaining genetic variability in plant communities at restored wetland habitats has been emphasized in several studies (Seliskar 1995;Smith and Proffitt 1999;Seliskar and Gallagher 2000;Williams 2001;Proffitt et al 2003;Travis and Sheridan 2006). Zedler (2006) noted that restoring wetland functions at a landscape scale involves site-based practices that may include manipulation of hydrologic conditions, salinity, soils, topography, and microbial communities in addition to establishing plant communities.…”

Section: Introductionmentioning

confidence: 98%

Intraspecific Variation in Growth of Marsh Macrophytes in Response to Salinity and Soil Type: Implications for Wetland Restoration

Howard

2009

Estuaries and Coasts

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Genetic diversity within plant populations can influence plant community structure along environmental gradients. In wetland habitats, salinity and soil type are factors that can vary along gradients and therefore affect plant growth. To test for intraspecific growth variation in response to these factors, a greenhouse study was conducted using common plants that occur in northern Gulf of Mexico brackish and salt marshes. Individual plants of Distichlis spicata, Phragmites australis, Schoenoplectus californicus, and Schoenoplectus robustus were collected from several locations along the coast in Louisiana, USA. Plant identity, based on collection location, was used as a measure of intraspecific variability. Prepared soil mixtures were organic, silt, or clay, and salinity treatments were 0 or 18 psu. Significant intraspecific variation in stem number, total stem height, or biomass was found in all species. Within species, response to soil type varied, but increased salinity significantly decreased growth in all individuals. Findings indicate that inclusion of multiple genets within species is an important consideration for marsh restoration projects that include vegetation plantings. This strategy will facilitate establishment of plant communities that have the flexibility to adapt to changing environmental conditions and, therefore, are capable of persisting over time.

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Section: Introductionmentioning

confidence: 98%

Intraspecific Variation in Growth of Marsh Macrophytes in Response to Salinity and Soil Type: Implications for Wetland Restoration

Howard

2009

Estuaries and Coasts

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“…These observations suggest that R. maritima populations may be relatively closed. In a genetic survey of H. wrightii in Galveston Bay, Travis and Sheridan (2006) also found evidence of localized recruitment, and such genetic studies are clearly warranted for R. maritima in the northern Gulf of Mexico to determine the extent to which seeds are dispersed vs retained.…”

Section: Discussionmentioning

confidence: 99%

Growth and Reproduction of Ruppia maritima in the Northern Gulf of Mexico

McGovern

2009

goms

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“…However, sampling-scale matters, and in one study that was conducted at extremely small scale (e.g., 10 × 10 m; Zipperle et al, 2011), only 26.8-32.5% of individuals originated within the sampled area (Zipperle et al, 2011). In other studies, dispersal distances documented through assignment tests indicate movement can be on the order of kilometers to hundreds of kilometers, which would be sufficient to connect many local patch networks and beyond (Ruggiero et al, 2002;Travis and Sheridan, 2006;Tomasello et al, 2009;Zipperle et al, 2009;Serra et al, 2010;Bricker et al, 2011;Huotari et al, 2011;Nakajima et al, 2014;Oliva et al, 2014;Triest and Fenart, 2014;Jahnke et al, 2015).…”

Section: Mpmentioning

confidence: 99%

Limited pollen dispersal, small genetic neighborhoods, and biparental inbreeding inVallisneria americana

Lloyd

Tumas

Neel

2018

American J of Botany

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Frequent pollen dispersal is not expected among patches, and even within patches, gene flow via pollen will be limited. Limited pollen dispersal establishes genetic neighborhoods, which, unless overcome by seed and propagule dispersal, will lead to genetic differentiation even in a continuous population. Unless loss and fragmentation drive populations to extreme sex bias, local pollen dispersal is likely to be unaffected by habitat loss and fragmentation per se because the spatial scale of patch isolation already exceeds pollen dispersal distances. Therefore, managing specifically for pollen connectivity is only relevant over very short distances.

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Genetic structure of natural and restored shoalgrass Halodule wrightii populations in the NW Gulf of Mexico

Cited by 15 publications

References 53 publications

Intraspecific Variation in Growth of Marsh Macrophytes in Response to Salinity and Soil Type: Implications for Wetland Restoration

Intraspecific Variation in Growth of Marsh Macrophytes in Response to Salinity and Soil Type: Implications for Wetland Restoration

Growth and Reproduction of Ruppia maritima in the Northern Gulf of Mexico

Limited pollen dispersal, small genetic neighborhoods, and biparental inbreeding inVallisneria americana

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