Non-predatory mortality of planktonic copepods in a reef area influenced by estuarine plume
Although it has been proven that non-predatory mortality accounts for a large proportion of copepod mortality, there is still a lack of knowledge of the temporal and spatial patterns and influence of environmental variables on non-predatory mortality, especially in tropical areas where reefs are inf...
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| Veröffentlicht in: | Marine environmental research 2020-07, Vol.159, p.105024-105024, Article 105024 |
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| creator | Silva, Alef Jonathan da Melo, Pedro Augusto Mendes de Castro Neumann-Leitão, Sigrid Melo Júnior, Mauro de |
| description | Although it has been proven that non-predatory mortality accounts for a large proportion of copepod mortality, there is still a lack of knowledge of the temporal and spatial patterns and influence of environmental variables on non-predatory mortality, especially in tropical areas where reefs are influenced by estuarine plumes. This study evaluated the percentage of carcasses and the non-predatory mortality rates for planktonic nauplii and copepodites in a bay with the presence of reefs under the influence of an estuarine plume, in the Atlantic tropical region. The average percentage of carcasses was less than 13% for both nauplii and copepodites, and was close to the minimum for other marine environments. However, there was a variation according to the different families and life stages of planktonic copepods. Nauplii had the highest mortality rate, with a mean rate of 0.04 ± 0.02 day−1 (maximum, 0.11 day−1), while the copepodites had a mean of 0.03 ± 0.01 day−1 (maximum of 0.06 day−1). Non-predatory mortality was higher in the rainy season, and differed between the nearby studied areas (bay, plume and reefs). Considering the three areas separately, only the estuarine plume showed higher percentages of carcass and non-predatory mortality rates of nauplii and copepodites. The increase in mortality rates for some copepod families was influenced by high salinity and low values of chlorophyll-a, dissolved oxygen and pH. These results demonstrate that the non-predatory mortality of copepods varies in a complex mosaic of interconnected ecosystems, and that the relationships between environmental variables with some groups may indicate susceptibility of different stages and families to death due to specific environmental conditions.
•The percentage of carcasses and non-predatory mortality rates of copepods differed between nearby coastal areas in Brazil.•Between 4 and 30% of individuals from both nauplii and copepodites are carcasses.•The mortality rates for copepods had a maximum mean of 0.04 d−1 and higher rates were observed during the rainy season.•The mortality rates of some copepod families were related to high salinity and low values of chlorophyll-a, oxygen and pH. |
| doi_str_mv | 10.1016/j.marenvres.2020.105024 |
| format | Article |
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•The percentage of carcasses and non-predatory mortality rates of copepods differed between nearby coastal areas in Brazil.•Between 4 and 30% of individuals from both nauplii and copepodites are carcasses.•The mortality rates for copepods had a maximum mean of 0.04 d−1 and higher rates were observed during the rainy season.•The mortality rates of some copepod families were related to high salinity and low values of chlorophyll-a, oxygen and pH.</description><identifier>ISSN: 0141-1136</identifier><identifier>EISSN: 1879-0291</identifier><identifier>DOI: 10.1016/j.marenvres.2020.105024</identifier><language>eng</language><publisher>London: Elsevier Ltd</publisher><subject>Aquatic crustaceans ; Brackishwater environment ; Carcasses ; Chlorophyll ; Chlorophyll a ; Copepoda ; Copepodites ; Dissolved oxygen ; Environmental conditions ; Estuaries ; Marine environment ; Mortality ; Nauplii ; Neutral red ; Plankton ; Plumes ; Rainy season ; Reefs ; Tropical climate ; Tropical coastal waters ; Tropical environment ; Tropical environments ; Wet season</subject><ispartof>Marine environmental research, 2020-07, Vol.159, p.105024-105024, Article 105024</ispartof><rights>2020 Elsevier Ltd</rights><rights>Copyright Elsevier BV Jul 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c306t-ed5aeaee286e0d8546fb7a5034dc8ae609de1802e762d3b73ae10c48a31e633f3</citedby><cites>FETCH-LOGICAL-c306t-ed5aeaee286e0d8546fb7a5034dc8ae609de1802e762d3b73ae10c48a31e633f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.marenvres.2020.105024$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,778,782,3539,27911,27912,45982</link.rule.ids></links><search><creatorcontrib>Silva, Alef Jonathan da</creatorcontrib><creatorcontrib>Melo, Pedro Augusto Mendes de Castro</creatorcontrib><creatorcontrib>Neumann-Leitão, Sigrid</creatorcontrib><creatorcontrib>Melo Júnior, Mauro de</creatorcontrib><title>Non-predatory mortality of planktonic copepods in a reef area influenced by estuarine plume</title><title>Marine environmental research</title><description>Although it has been proven that non-predatory mortality accounts for a large proportion of copepod mortality, there is still a lack of knowledge of the temporal and spatial patterns and influence of environmental variables on non-predatory mortality, especially in tropical areas where reefs are influenced by estuarine plumes. This study evaluated the percentage of carcasses and the non-predatory mortality rates for planktonic nauplii and copepodites in a bay with the presence of reefs under the influence of an estuarine plume, in the Atlantic tropical region. The average percentage of carcasses was less than 13% for both nauplii and copepodites, and was close to the minimum for other marine environments. However, there was a variation according to the different families and life stages of planktonic copepods. Nauplii had the highest mortality rate, with a mean rate of 0.04 ± 0.02 day−1 (maximum, 0.11 day−1), while the copepodites had a mean of 0.03 ± 0.01 day−1 (maximum of 0.06 day−1). Non-predatory mortality was higher in the rainy season, and differed between the nearby studied areas (bay, plume and reefs). Considering the three areas separately, only the estuarine plume showed higher percentages of carcass and non-predatory mortality rates of nauplii and copepodites. The increase in mortality rates for some copepod families was influenced by high salinity and low values of chlorophyll-a, dissolved oxygen and pH. These results demonstrate that the non-predatory mortality of copepods varies in a complex mosaic of interconnected ecosystems, and that the relationships between environmental variables with some groups may indicate susceptibility of different stages and families to death due to specific environmental conditions.
•The percentage of carcasses and non-predatory mortality rates of copepods differed between nearby coastal areas in Brazil.•Between 4 and 30% of individuals from both nauplii and copepodites are carcasses.•The mortality rates for copepods had a maximum mean of 0.04 d−1 and higher rates were observed during the rainy season.•The mortality rates of some copepod families were related to high salinity and low values of chlorophyll-a, oxygen and pH.</description><subject>Aquatic crustaceans</subject><subject>Brackishwater environment</subject><subject>Carcasses</subject><subject>Chlorophyll</subject><subject>Chlorophyll a</subject><subject>Copepoda</subject><subject>Copepodites</subject><subject>Dissolved oxygen</subject><subject>Environmental conditions</subject><subject>Estuaries</subject><subject>Marine environment</subject><subject>Mortality</subject><subject>Nauplii</subject><subject>Neutral red</subject><subject>Plankton</subject><subject>Plumes</subject><subject>Rainy season</subject><subject>Reefs</subject><subject>Tropical climate</subject><subject>Tropical coastal waters</subject><subject>Tropical environment</subject><subject>Tropical environments</subject><subject>Wet season</subject><issn>0141-1136</issn><issn>1879-0291</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFkLtKBDEUhoMouF6ewYCNzawnl8lkSxFvINpoZRGyyRnIOjsZkxlh396sKxY2ViHh-0_-8xFyxmDOgKnL1XxtE_afCfOcA9--1sDlHpkx3Swq4Au2T2bAJKsYE-qQHOW8AoC6YfWMvD3FvhoSejvGtKHrmEbbhXFDY0uHzvbvY-yDoy4OOESfaeippQmxpeVTW65tN2Hv0NPlhmIeJ5tCjyU6rfGEHLS2y3j6cx6T19ubl-v76vH57uH66rFyAtRYoa8tWkSuFYLXtVTtsrE1COmdtqhg4ZFp4Ngo7sWyERYZOKmtYKiEaMUxudjNHVL8mEoJsw7ZYVfqY5yy4ZILDbCQuqDnf9BVnFJf2hVKSqWZbFShmh3lUsw5YWuGFIrljWFgttLNyvxKN1vpZie9JK92SSz7fgZMJrvw7SckdKPxMfw74wt0fo_k</recordid><startdate>202007</startdate><enddate>202007</enddate><creator>Silva, Alef Jonathan da</creator><creator>Melo, Pedro Augusto Mendes de Castro</creator><creator>Neumann-Leitão, Sigrid</creator><creator>Melo Júnior, Mauro de</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>7ST</scope><scope>7T5</scope><scope>7TN</scope><scope>7U7</scope><scope>C1K</scope><scope>F1W</scope><scope>H94</scope><scope>M7N</scope><scope>SOI</scope><scope>7X8</scope></search><sort><creationdate>202007</creationdate><title>Non-predatory mortality of planktonic copepods in a reef area influenced by estuarine plume</title><author>Silva, Alef Jonathan da ; Melo, Pedro Augusto Mendes de Castro ; Neumann-Leitão, Sigrid ; Melo Júnior, Mauro de</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c306t-ed5aeaee286e0d8546fb7a5034dc8ae609de1802e762d3b73ae10c48a31e633f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Aquatic crustaceans</topic><topic>Brackishwater environment</topic><topic>Carcasses</topic><topic>Chlorophyll</topic><topic>Chlorophyll a</topic><topic>Copepoda</topic><topic>Copepodites</topic><topic>Dissolved oxygen</topic><topic>Environmental conditions</topic><topic>Estuaries</topic><topic>Marine environment</topic><topic>Mortality</topic><topic>Nauplii</topic><topic>Neutral red</topic><topic>Plankton</topic><topic>Plumes</topic><topic>Rainy season</topic><topic>Reefs</topic><topic>Tropical climate</topic><topic>Tropical coastal waters</topic><topic>Tropical environment</topic><topic>Tropical environments</topic><topic>Wet season</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Silva, Alef Jonathan da</creatorcontrib><creatorcontrib>Melo, Pedro Augusto Mendes de Castro</creatorcontrib><creatorcontrib>Neumann-Leitão, Sigrid</creatorcontrib><creatorcontrib>Melo Júnior, Mauro de</creatorcontrib><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Environment Abstracts</collection><collection>Immunology Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Toxicology Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Environment Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Marine environmental research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Silva, Alef Jonathan da</au><au>Melo, Pedro Augusto Mendes de Castro</au><au>Neumann-Leitão, Sigrid</au><au>Melo Júnior, Mauro de</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Non-predatory mortality of planktonic copepods in a reef area influenced by estuarine plume</atitle><jtitle>Marine environmental research</jtitle><date>2020-07</date><risdate>2020</risdate><volume>159</volume><spage>105024</spage><epage>105024</epage><pages>105024-105024</pages><artnum>105024</artnum><issn>0141-1136</issn><eissn>1879-0291</eissn><abstract>Although it has been proven that non-predatory mortality accounts for a large proportion of copepod mortality, there is still a lack of knowledge of the temporal and spatial patterns and influence of environmental variables on non-predatory mortality, especially in tropical areas where reefs are influenced by estuarine plumes. This study evaluated the percentage of carcasses and the non-predatory mortality rates for planktonic nauplii and copepodites in a bay with the presence of reefs under the influence of an estuarine plume, in the Atlantic tropical region. The average percentage of carcasses was less than 13% for both nauplii and copepodites, and was close to the minimum for other marine environments. However, there was a variation according to the different families and life stages of planktonic copepods. Nauplii had the highest mortality rate, with a mean rate of 0.04 ± 0.02 day−1 (maximum, 0.11 day−1), while the copepodites had a mean of 0.03 ± 0.01 day−1 (maximum of 0.06 day−1). Non-predatory mortality was higher in the rainy season, and differed between the nearby studied areas (bay, plume and reefs). Considering the three areas separately, only the estuarine plume showed higher percentages of carcass and non-predatory mortality rates of nauplii and copepodites. The increase in mortality rates for some copepod families was influenced by high salinity and low values of chlorophyll-a, dissolved oxygen and pH. These results demonstrate that the non-predatory mortality of copepods varies in a complex mosaic of interconnected ecosystems, and that the relationships between environmental variables with some groups may indicate susceptibility of different stages and families to death due to specific environmental conditions.
•The percentage of carcasses and non-predatory mortality rates of copepods differed between nearby coastal areas in Brazil.•Between 4 and 30% of individuals from both nauplii and copepodites are carcasses.•The mortality rates for copepods had a maximum mean of 0.04 d−1 and higher rates were observed during the rainy season.•The mortality rates of some copepod families were related to high salinity and low values of chlorophyll-a, oxygen and pH.</abstract><cop>London</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.marenvres.2020.105024</doi><tpages>1</tpages></addata></record> |
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| ispartof | Marine environmental research, 2020-07, Vol.159, p.105024-105024, Article 105024 |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Aquatic crustaceans Brackishwater environment Carcasses Chlorophyll Chlorophyll a Copepoda Copepodites Dissolved oxygen Environmental conditions Estuaries Marine environment Mortality Nauplii Neutral red Plankton Plumes Rainy season Reefs Tropical climate Tropical coastal waters Tropical environment Tropical environments Wet season |
| title | Non-predatory mortality of planktonic copepods in a reef area influenced by estuarine plume |
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