Tidal hydrology and habitat utilization by resident nekton inPragmites and Non-Phragmites Marshes

Osgood, David T.; Yozzo, David J.; Chambers, Randolph M.; Jacobson, Dana; Hoffman, Timothy J.; Wnek, Jason

doi:10.1007/bf02823728

Cited by 63 publications

(52 citation statements)

References 34 publications

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“…This is probably because Nanhui was more disturbed than the other sites. In addition to the disturbance level, the histories of plant invasion at different sites may also influence the site effects.Although several studies have documented the roles of seasonality in the evaluation of invasive plant effects on fauna (Angradi et al 2001, Talley & Levin 2001, Osgood et al 2003, our present study revealed that seasonal variation has less effect on nematode communities than sites and plant species. …”

contrasting

confidence: 79%

“…Previous studies have indicated that, in the home regions of Spartina, the aboveground vegetation biomass of Spartina is smaller than that of Phragmites (Angradi et al 2001, Osgood et al 2003. The present study implies that the exotic plants grow better in the introduced range than in their natural range.…”

Section: Effects Of Spartina Alterniflora Invasions Across Sitessupporting

confidence: 48%

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Effects of Spartina alterniflora invasion on benthic nematode communities in the Yangtze Estuary

Chen¹,

Li²,

Hu³

et al. 2007

Mar. Ecol. Prog. Ser.

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Invasions of exotic plant species in estuaries have occurred worldwide, and may profoundly affect native biodiversity and estuarine ecosystem functioning. To assess the effect of plant invasions on benthic meiofauna, we compared the nematode communities in marshes dominated, respectively, by invasive Spartina alterniflora and native Scirpus mariqueter and Phragmites australis at 3 local sites over 2 seasons in the Yangtze River estuary, PR China. S. alterniflora stands had generally lower nematode trophic diversity than the stands of the 2 native plants, suggesting that the exotic plant led to a simplified benthic food web. The relative abundance of bacterial-feeding nematodes tended to increase in S. alterniflora marshes compared to P. australis marshes. The increased bacterial-feeding nematodes in S. alterniflora stands are likely to reflect the altered decomposition processes, rates and pathways, which may, in turn, modify belowground nutrient cycling of the estuarine ecosystems. The dissimilarity in nematode community structure between S. alterniflora and S. mariqueter marshes was smaller than that between S. alterniflora and P. australis marshes, and the dissimilarity between Spartina-invaded and native marshes was even smaller than between the 2 native plant marshes. It is suggested that the detection of the ecological consequences of plant invasions depends on which native plant species is considered. Site effects were generally detected in the comparison of sediment properties and nematodes among 3 plant marshes. Sediment water content, electrical conductivity, bacterial biomass and litter biomass were identified as the most important factors in the shaping of the nematode communities.KEY WORDS: Community structure · Cordgrass · C 3 plant · C 4 plant · Diversity · Exotic plant · Nematodes · Wetlands Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 336: [99][100][101][102][103][104][105][106][107][108][109][110] 2007 Spartina invasions influence benthic communities when compared with unvegetated mudflats (Zipperer 1996, O'Connell 2002, Neira et al. 2005, and several studies have compared benthic macrofaunal communities of the invasive Spartina and those of native vegetated marshes , Chen et al. 2005, Neira et al. 2005, and yielded inconsistent results. In Little Swanport estuary, Tasmania, Hedge & Kriwoken (2000) found that species richness and total abundance of macrofauna in invasive S. anglica and native saltmarshes do not differ significantly. Chen et al. (2005) reported that the replacement of Scirpus mariqueter by S. alterniflora results in reduced macroinvertebrate density and species diversity in salt marshes of Chongming Island in the Yangtze River estuary, China. Neira et al. (2005) found higher macrofaunal species richness in Spartina hybrid-invaded patches relative to native Salicornia marshes in San Francisco Bay, USA, but no differences in total macrofaunal density were found. These studies suggest that the responses of benthic ma...

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contrasting

confidence: 79%

Section: Effects Of Spartina Alterniflora Invasions Across Sitessupporting

confidence: 48%

Effects of Spartina alterniflora invasion on benthic nematode communities in the Yangtze Estuary

Chen¹,

Li²,

Hu³

et al. 2007

Mar. Ecol. Prog. Ser.

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“…However, epifaunal abundance is lower in Phragmites than in Spartina (Robertson and Weis, 2005) and the abundance of some nektonic species, such as juvenile Fundulus heteroclitus, may be lower . Also, the hydrology and topology of the marsh differ with Phragmites having reduced tidal flooding that may limit use by nekton (Osgood et al, 2003). Taken together, these studies suggest that the replacement of a Spartina marsh with Phragmites is unlikely to have a significant effect on habitat quality for juvenile blue crabs.…”

Section: Introductionmentioning

confidence: 91%

“…In general, Phragmites differs little from Spartina as a habitat for macrofauna (Weis and Weis, 2003). Most nektonic species use both marsh types similarly (Hanson et al, 2002;Jivoff and Able, 2003;Meyer et al, 2001;Osgood et al, 2003;Robertson and Weis, 2007), and macrofaunal densities are equivalent (Osgood et al, 2003;Posey et al, 2003). However, epifaunal abundance is lower in Phragmites than in Spartina (Robertson and Weis, 2005) and the abundance of some nektonic species, such as juvenile Fundulus heteroclitus, may be lower .…”

Section: Introductionmentioning

confidence: 97%

Effects of anthropogenic shoreline hardening and invasion by Phragmites australis on habitat quality for juvenile blue crabs (Callinectes sapidus)

Long

Grow

Majoris

et al. 2011

Journal of Experimental Marine Biology and Ecology

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“…Specifically, such alterations to vegetation impact grounddwelling and plant canopy-dwelling invertebrates. On the East Coast and in the northeast of the United States, Phragmites australis (common reed) lowered density and abundance of soil macroinvertebrates, decreased canopy-dwelling arthropod species richness, diversity, and abundance, and shifted the trophic structure from carnivore-to herbivore-dominated community (Angradi et al 2001, Osgood et al 2003, Raichel et al 2003, Gratton and Denno 2005. On the West Coast of the United States, invasive Spartina alterniflora crossed with native S. foliosa, and invasion by the hybrid plant decreased macrofauna abundance by 75% and lowered biomass of surface-feeding infauna (Levin et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Invasive plant ecosystem engineer facilitates community and trophic level alteration for brackish marsh invertebrates

2014

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Abstract. Wetland habitats are becoming increasingly scarce worldwide while experiencing exceptionally high levels of plant invasion. Invasive plant species affect ecosystems through numerous avenues, including acting as ecosystem engineers, contributing unique plant functional traits, and altering trophic dynamics. We examined the impacts of the invasive weed Lepidium latifolium on soil-dwelling and canopydwelling invertebrate communities in a brackish marsh of northern California. Invertebrate abundance, species richness, diversity, and community composition were measured in both invaded and non-invaded areas of the marsh in four time periods that correspond with different L. latifolium phenologic phases. We observed these different stages of L. latifolium, and we recorded alterations in the habitat structure provided by L. latifolium as the plant entered senescence. L. latifolium had differential impacts on the two invertebrate communities studied. The presence of L. latifolium increased abundance of soil-dwelling invertebrates and decreased the species richness of canopy-dwelling invertebrates in the tidal marsh-terrestrial ecotone where L. latifolium ameliorates harsh physical conditions. No changes occurred in the tidal marsh plain and fringing tidal marsh where L. latifolium's physical structure is more similar to existing non-L. latifolium structure. During full senescence, L. latifolium reduced canopy-dwelling invertebrate abundance and altered trophic dynamics, shifting composition to a predator-dominated community. Our results demonstrate that L. latifolium can impact brackish marsh ecosystems, and we hypothesize L. latifolium's unique functional traits (large inflorescence and seasonal senescence) enable it to act as an ecosystem engineer that alters community and trophic dynamics. Mechanisms through which plant invaders alter ecosystem processes are dynamic in space and time, thus, future research will require the use of manipulative experiments to inform site-specific management strategies.

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Tidal hydrology and habitat utilization by resident nekton inPragmites and Non-Phragmites Marshes

Cited by 63 publications

References 34 publications

Effects of Spartina alterniflora invasion on benthic nematode communities in the Yangtze Estuary

Effects of Spartina alterniflora invasion on benthic nematode communities in the Yangtze Estuary

Effects of anthropogenic shoreline hardening and invasion by Phragmites australis on habitat quality for juvenile blue crabs (Callinectes sapidus)

Invasive plant ecosystem engineer facilitates community and trophic level alteration for brackish marsh invertebrates

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