Spatial and temporal variation in estuarine fish and invertebrate assemblages: Analysis of an 11-year data set

Desmond, Julie; Deutschman, Douglas H.; Zedler, Joy B.

doi:10.1007/bf02804890

Cited by 61 publications

(56 citation statements)

References 46 publications

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“…The annual dynamics of water renewal in Santo André lagoon and the inherent year-to-year variability of physical conditions in lagoons (Barnes, 1980;Desmond et al, 2002) lead to a high temporal variability in biological communities (phytoplankton community e Duarte et al, 2006; Ruppia cirrhosa e Calado and Duarte, 2000; benthic community, as it was found in this study). Benthic community sampled in the present study consisted of 42 taxa, most of which are typical of these lagoonal systems (e.g.…”

Section: Discussionsupporting

confidence: 66%

“…Abra segmentum). Nevertheless, the maintenance of limnetic conditions in 1984 led to the disappearance of the species with marine affinity, and consequently a drastic decrease of those metrics was observed, revealing that inlet closure for long periods has negative effects on diversity (Desmond et al, 2002). In 1985 the benthic community seemed to be evolving towards the situation observed in 1979, and in 2010 higher number of taxa, diversity and density were observed, emphasizing the fact that the annual connection with sea enables the lagoon colonization with species of marine origin.…”

Section: Discussionmentioning

confidence: 99%

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Inter-annual variations of macrobenthic communities over three decades in a land-locked coastal lagoon (Santo André, SW Portugal)

Correia

Costa

Chainho

et al. 2012

Estuarine, Coastal and Shelf Science

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Keywords: macrobenthic communities land-locked coastal lagoon ecological status long-term changes water framework directive a b s t r a c t Santo André is an enclosed brackish water coastal lagoon with temporary connections to the sea by a man-made channel. The exchange and mixture of saltwater and freshwater is irregular and the lagoon may show daily and seasonal fluctuations, but also long-term variation. Different benthic communities may be present along the annual cycle according to the magnitude of episodic freshwater and sea water inputs.In the last 30 years the communication with the sea has followed different regimes from year to year and, as a consequence, macrobenthic communities, assessed several times during the period before the opening to the sea, shifted from freshwater to marine affinities. Major differences were found between 1979 and 2010, with a preponderance of species with marine affinity, and the 1980s in which the organisms with freshwater affinity prevailed. Benthic communities are frequently used to assess aquatic environmental condition. Metrics used in the indices currently under discussion to assess ecological status of aquatic ecosystems within the scope of European Water Framework Directive were applied to Santo André data and the applicability of these metrics to assess quality in this coastal land-locked lagoon was discussed.

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Section: Discussionsupporting

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Inter-annual variations of macrobenthic communities over three decades in a land-locked coastal lagoon (Santo André, SW Portugal)

Correia

Costa

Chainho

et al. 2012

Estuarine, Coastal and Shelf Science

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“…Watershed land cover characteristics can be strong indicators of degraded estuarine health (Hale et al 2004;Brooks et al 2006). Watershed development has been associated with lower estuarine species diversity, altered food webs, and altered benthic community composition (Dauer et al 2000;Lerberg et al 2000;Breitburg 2002;Deegan et al 1997;Desmond et al 2002). Previous studies at the Smithsonian Environmental Research Center reported that local watershed land cover provided significant indicators of marsh bird diversity (DeLuca et al 2004), blue crab and bivalve abundances (King et al 2005), and toxicants in fish (King et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Effects of watershed and estuarine characteristics on the abundance of submerged aquatic vegetation in Chesapeake Bay subestuaries

Weller

Gallegos

et al. 2007

Estuaries and Coasts

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Watershed land use can affect submerged aquatic vegetation (SAV) by elevating nutrient and sediment loading to estuaries. We analyzed the effects of watershed use and estuarine characteristics on the spatial variation of SAV abundance among 101 shallow subestuaries of Chesapeake Bay during [1984][1985][1986][1987][1988][1989][1990][1991][1992][1993][1994][1995][1996][1997][1998][1999][2000][2001][2002][2003]. Areas of these subestuaries range from 0.1 to 101 km 2 , and their associated local watershed areas range from 6 to 1664 km 2 . Watershed land cover ranges from 6% to 81% forest, 1% to 64% cropland, 2% to 38% grassland, and 0.3% to 89% developed land. Landscape analyses were applied to develop a number of subestuary metrics (such as subestuary area, mouth width, elongation ratio, fractal dimension of shoreline, and the ratio of local watershed area to subestuary area) and watershed metrics (such as watershed area). Using mapped data from aerial SAV surveys, we calculated SAV coverage for each subestuary in each year during 1984-2003 as a proportion of potential SAV habitat (the area , 2 m deep). The variation in SAV abundance among subestuaries was strongly linked with subestuary and watershed characteristics. A regression tree model indicated that 60% of the variance in SAV abundance could be explained by subestuary fractal dimension, mean tidal range, local watershed dominant land cover, watershed to subestuary area ratio, and mean wave height. Similar explanatory powers were found in wet and dry years, but different independent variables were used. Repeated measures ANOVA with multiple-mean comparison showed that SAV abundance declined with the dominant watershed land cover in the order: forested, mixed-undisturbed, or mixed-developed . mixedagricultural . agricultural . developed. Change-point analyses indicated strong threshold responses of SAV abundance to point source total nitrogen and phosphorus inputs, the ratio of local watershed area to subestuary area, and septic system density in the local watershed.

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“…Our study site is within a Mediterranean climate that has a moderate annual range of water temperature (approximately 13-25uC) and receives an average annual rainfall of 27 cm, with 90% of the precipitation usually occurring in a few large storms between November and March (Desmond et al 2002). Given a narrow range of water temperature (Table 1), the lack of any strong patterns in the temporal variability of juvenile P. cornuta RGRs during months with little or no rainfall is not surprising at our site.…”

Section: Discussionmentioning

confidence: 99%

“…We adapted methods used in those laboratory flume experiments to measure the in situ growth rates of individual P. cornuta in relation to the environmental factor that has the greatest seasonal variability at our study site in southern California: major rain events causing stormwater runoff and short-term reductions in salinity (Desmond et al 2002;Gersberg et al 2004). Salinity has long been considered a critical factor affecting estuarine benthos (Sanders et al 1965), and pollution associated with stormwater runoff is well documented in urban estuaries (Gersberg et al 2004).…”

mentioning

confidence: 99%

Seasonal variability in the juvenile growth rate of an infaunal polychaete is related to major rain events

Colvin

Hentschel

2011

Limnology & Oceanography

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We measured juvenile growth rates of the spionid polychaete Polydora cornuta in situ by transplanting and recovering small vials containing labeled individuals and measuring each worm's body volume before and after week-long transplantations into field sediments. To measure seasonal variation of in situ growth rates, we performed 15 intertidal transplantations between November 2008 and January 2010 in Oneonta Slough within the Tijuana River National Estuarine Research Reserve. Our study period included four major rain events with precipitation greater than 2 cm d 21 that reduced salinity in the tidal channel below 20%. On average, we recovered one third of the 72 juveniles that were deployed during each transplantation. Mean relative growth rates ranged from 0% to 15% d 21 among the 15 transplantations and were positively correlated with the mean salinity during each transplantation period. Mean relative growth rates during or a few days after major rain events averaged 2% d 21 , whereas relative growth rates during all other weeks exceeded 7% d 21 . During the NovemberMarch rainy season, mean relative growth rates exceeded 8% d 21 when rain did not occur during a transplantation or during the preceding 7 d, indicating that environmental conditions favoring rapid growth of P. cornuta juveniles returned approximately 1 week after a major rain event. Although the small size of P. cornuta juveniles imposes methodological challenges, their rapid growth and our transplantation methods provide a way to assess environmental quality from the perspective of infaunal performance on small temporal and spatial scales.

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Spatial and temporal variation in estuarine fish and invertebrate assemblages: Analysis of an 11-year data set

Cited by 61 publications

References 46 publications

Inter-annual variations of macrobenthic communities over three decades in a land-locked coastal lagoon (Santo André, SW Portugal)

Inter-annual variations of macrobenthic communities over three decades in a land-locked coastal lagoon (Santo André, SW Portugal)

Effects of watershed and estuarine characteristics on the abundance of submerged aquatic vegetation in Chesapeake Bay subestuaries

Seasonal variability in the juvenile growth rate of an infaunal polychaete is related to major rain events

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