Agricultural impacts on Mediterranean wetlands : the effect of pesticides on survival and hatching rates in copepods

Parra, Gema; Jiménez-Melero, Raquel; Guerrero, Francisco

doi:10.1051/limn:20054130161

Cited by 22 publications

(13 citation statements)

References 28 publications

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“…Copepod mortality (M, %) was calculated as: M = 100 D / (D + s), where D is the number of dead individuals, and s is the number of surviving individuals. The salinity tolerance range in Calanipeda aquaedulcis and Arctodiaptomus salinus was estimated taking into account the lethal salinity values affecting 50% of the original number (LS 50 ) (Hopper 1960, Parra et al 2005, Chen et al 2006) in 5 to 10 d. We chose this period because the process of salinity acclimation in crustaceans usually takes at least 3 d (Lance 1963, Khlebovich 1981, Lee & Petersen 2003.…”

Section: Experimental Set-up and Effect Of Salinity Variation On Mortmentioning

confidence: 99%

Calanipeda aquaedulcis and Arctodiaptomus salinus are exceptionally euryhaline osmoconformers: evidence from mortality, oxygen consumption, and mass density patterns

Svetlichny¹,

Hubareva²,

Khanaychenko³

2012

Mar. Ecol. Prog. Ser.

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Mortality, respiration rate, and body mass density of the estuarine copepods Calanipeda aquaedulcis and Arctodiaptomus salinus and their eggs were studied over a wide range of salinities. Empirical hydrodynamic modeling was applied to calculate body mass density using the sinking speed of the copepods. According to the index of median lethal salinity (LS 50 ), the salinity tolerance ranges of C. aquaedulcis and A. salinus reared at 18 psu were 0.1 to 50 and 0.1 to 35 psu, respectively. No significant effect of salinity on the specific oxygen consumption rate was found in the range from 0.1 to 40 psu in both species, while mean body mass density increased iso-osmotically with water salinity from (mean ± SD) 1.053 ± 0.007 to 1.077 ± 0.005 g cm −3 in C. aquaedulcis and from 1.039 ± 0.004 to 1.062 ± 0.007 g cm −3 in A. salinus. However, body density contrast and sinking speed were stable in both species, allowing them to avoid buoyancy problems with changing salinity. The mean mass density of resting eggs in A. salinus gradually increased isoosmotically following gradual changes in salinity. In contrast to resting eggs, the mass density of subitaneous eggs was not altered by changes in the surrounding salinity, suggesting a hysteresis response in these eggs.

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Section: Experimental Set-up and Effect Of Salinity Variation On Mortmentioning

confidence: 99%

Calanipeda aquaedulcis and Arctodiaptomus salinus are exceptionally euryhaline osmoconformers: evidence from mortality, oxygen consumption, and mass density patterns

Svetlichny¹,

Hubareva²,

Khanaychenko³

2012

Mar. Ecol. Prog. Ser.

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“…Pesticides used in agriculture production constitute one of the most important sources of anthropogenic pollution into aquatic ecosystems (Parra et al, 2005;Stendera et al, 2012). Currently, the prospective Ecological Risk Assessment (ERA) of pesticides is mostly based on data obtained from single-species toxicity tests.…”

Section: Introductionmentioning

confidence: 99%

Effects of intra- and interspecific competition on the sensitivity of aquatic macroinvertebrates to carbendazim

Arco

Parra

Rico

et al. 2015

Ecotoxicology and Environmental Safety

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“…However, they are among the most threatened ecosystems on earth due to the long history of interactions between humans and biodiversity loss (Zalidis et al, 1999). During the last few millennia, more than half of the Mediterranean wetlands have been totally drained for controlling water-borne diseases, creating houses, expanding agriculture and installing urban infrastructures and other human welfare (Zalidis et al, 1999;El-Bana et al, 2000;Parra et al, 2005;Blondel et al, 2010;Robledano et al, 2011). Many of the remaining wetlands are threatened by mismanagement and overexploitation of their natural resources (Pardo et al, 2008;Robledano et al, 2011;Eid and Shaltout, 2013;Moreno-Gonza´lez et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Gravel pads of powerline towers as human-made habitats for ruderal vegetation in some Mediterranean wetlands of Egypt: Implications for management

El‐Bana

2015

Egyptian Journal of Aquatic Research

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Despite the widespread of transmission powerlines in many aquatic ecosystems of Egypt, little is known about their ecological impacts. The current study evaluates floristic composition associated with gravel pads constructed for stabilizing powerline towers in the wetlands of Burullus and Manzala. Plant cover was measured for 34 randomly selected in paired gravel pads and adjacent wetlands. Ordination analysis indicated that vegetation on the gravel pads significantly differed from that in wetlands. Thirty-two species were recorded in the gravel pad plots (more than twice the number found in wetlands). Mean species richness was significantly higher in gravel pad plots (3.8 species) than in wetland plots (1.7 species). Gravel pad plots had a significantly lower cover than wetlands of Chenopodiaceae (12.9% vs. 28.7%) and Poaceae (15.7% vs. 32.2%), while Asteraceae showed higher cover in gravel pad plots (25%) than in wetlands (6.7%). Gravel pad plots were consistently occupied by ruderals, weeds and invasive species. Regression analysis showed that total vegetation cover and diversity indices increased significantly with rises in the thickness of the gravel pads. The study highlighted the importance of gravel pad corridors for the abundance of ruderal plant species that could eventually colonize more pristine areas in the adjacent wetlands. ª 2015 National Institute of Oceanography and Fisheries. Hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Agricultural impacts on Mediterranean wetlands : the effect of pesticides on survival and hatching rates in copepods

Cited by 22 publications

References 28 publications

Calanipeda aquaedulcis and Arctodiaptomus salinus are exceptionally euryhaline osmoconformers: evidence from mortality, oxygen consumption, and mass density patterns

Calanipeda aquaedulcis and Arctodiaptomus salinus are exceptionally euryhaline osmoconformers: evidence from mortality, oxygen consumption, and mass density patterns

Effects of intra- and interspecific competition on the sensitivity of aquatic macroinvertebrates to carbendazim

Gravel pads of powerline towers as human-made habitats for ruderal vegetation in some Mediterranean wetlands of Egypt: Implications for management

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