Low-pH Freshwater Discharges Drive Spatial and Temporal Variations in Life History Traits of Neritic Copepod Acartia tonsa

Victor M. Aguilera, Cristian A. Vargas, Patricio H. Manríquez, Jorge M. Navarro, Cristian Duarte

Resultado de la investigación: Comment/debate

16 Citas (Scopus)

Resumen

Land weathering by river runoff makes coastal oceans highly variable ecosystems in terms of seawater pH; however, its effects on biological components and, hence, on the coastal ecosystem functioning has been scarcely addressed. In this study, we determined part of the spatial and seasonal variability of the physical-chemical characteristics of seawater, and life history traits of the neritic copepod Acartia tonsa, along an estuarine-to-coastal zone geographic gradient in the southern Pacific Ocean. There, freshwater influences give rise to sharp gradients in pH, salinity, and temperature, which in turn, may affect the fitness of copepod populations inhabiting along the gradient. In fact, most of the studied copepod traits (egg size, ingestion, and egg production rates) were moderately (r 2 = 0.5, p < 0.05) to robustly (r 2 = 0.9, p < 0.05) explained by physical-chemical and biological (food abundance and composition) factors. Noteworthy was the negative relationship between low-pH waters and copepod reproductive outcomes. This effect was far evident in the estuarine area where small brood sizes and depleted egg production rates were significantly correlated with low seawater pH (r 2 = 0.6, p < 0.05). If short-term episodes of low-pH seawater constitute a significant threshold for reproduction, current findings should stimulate a better description of pH variability in coastal zones, as well as the study of biological consequences derived from the interaction between pH and others drivers on coastal marine populations.

Idioma originalEnglish
Páginas (desde-hasta)1084-1092
Número de páginas9
PublicaciónEstuaries and Coasts
Volumen36
N.º5
DOI
EstadoPublished - 1 sep 2013

Huella dactilar

Acartia tonsa
life history trait
temporal variation
spatial variation
Copepoda
life history
seawater
egg production
coastal zone
brood size
egg size
ocean
fitness
weathering
runoff
ecosystems
salinity
food
ecosystem
Pacific Ocean

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Aquatic Science

Citar esto

Aguilera, Victor M. ; Vargas, Cristian A. ; Manríquez, Patricio H. ; Navarro, Jorge M. ; Duarte, Cristian. / Low-pH Freshwater Discharges Drive Spatial and Temporal Variations in Life History Traits of Neritic Copepod Acartia tonsa. En: Estuaries and Coasts. 2013 ; Vol. 36, N.º 5. pp. 1084-1092.
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abstract = "Land weathering by river runoff makes coastal oceans highly variable ecosystems in terms of seawater pH; however, its effects on biological components and, hence, on the coastal ecosystem functioning has been scarcely addressed. In this study, we determined part of the spatial and seasonal variability of the physical-chemical characteristics of seawater, and life history traits of the neritic copepod Acartia tonsa, along an estuarine-to-coastal zone geographic gradient in the southern Pacific Ocean. There, freshwater influences give rise to sharp gradients in pH, salinity, and temperature, which in turn, may affect the fitness of copepod populations inhabiting along the gradient. In fact, most of the studied copepod traits (egg size, ingestion, and egg production rates) were moderately (r 2 = 0.5, p < 0.05) to robustly (r 2 = 0.9, p < 0.05) explained by physical-chemical and biological (food abundance and composition) factors. Noteworthy was the negative relationship between low-pH waters and copepod reproductive outcomes. This effect was far evident in the estuarine area where small brood sizes and depleted egg production rates were significantly correlated with low seawater pH (r 2 = 0.6, p < 0.05). If short-term episodes of low-pH seawater constitute a significant threshold for reproduction, current findings should stimulate a better description of pH variability in coastal zones, as well as the study of biological consequences derived from the interaction between pH and others drivers on coastal marine populations.",
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Low-pH Freshwater Discharges Drive Spatial and Temporal Variations in Life History Traits of Neritic Copepod Acartia tonsa. / Aguilera, Victor M.; Vargas, Cristian A.; Manríquez, Patricio H.; Navarro, Jorge M.; Duarte, Cristian.

En: Estuaries and Coasts, Vol. 36, N.º 5, 01.09.2013, p. 1084-1092.

Resultado de la investigación: Comment/debate

TY - JOUR

T1 - Low-pH Freshwater Discharges Drive Spatial and Temporal Variations in Life History Traits of Neritic Copepod Acartia tonsa

AU - Aguilera, Victor M.

AU - Vargas, Cristian A.

AU - Manríquez, Patricio H.

AU - Navarro, Jorge M.

AU - Duarte, Cristian

PY - 2013/9/1

Y1 - 2013/9/1

N2 - Land weathering by river runoff makes coastal oceans highly variable ecosystems in terms of seawater pH; however, its effects on biological components and, hence, on the coastal ecosystem functioning has been scarcely addressed. In this study, we determined part of the spatial and seasonal variability of the physical-chemical characteristics of seawater, and life history traits of the neritic copepod Acartia tonsa, along an estuarine-to-coastal zone geographic gradient in the southern Pacific Ocean. There, freshwater influences give rise to sharp gradients in pH, salinity, and temperature, which in turn, may affect the fitness of copepod populations inhabiting along the gradient. In fact, most of the studied copepod traits (egg size, ingestion, and egg production rates) were moderately (r 2 = 0.5, p < 0.05) to robustly (r 2 = 0.9, p < 0.05) explained by physical-chemical and biological (food abundance and composition) factors. Noteworthy was the negative relationship between low-pH waters and copepod reproductive outcomes. This effect was far evident in the estuarine area where small brood sizes and depleted egg production rates were significantly correlated with low seawater pH (r 2 = 0.6, p < 0.05). If short-term episodes of low-pH seawater constitute a significant threshold for reproduction, current findings should stimulate a better description of pH variability in coastal zones, as well as the study of biological consequences derived from the interaction between pH and others drivers on coastal marine populations.

AB - Land weathering by river runoff makes coastal oceans highly variable ecosystems in terms of seawater pH; however, its effects on biological components and, hence, on the coastal ecosystem functioning has been scarcely addressed. In this study, we determined part of the spatial and seasonal variability of the physical-chemical characteristics of seawater, and life history traits of the neritic copepod Acartia tonsa, along an estuarine-to-coastal zone geographic gradient in the southern Pacific Ocean. There, freshwater influences give rise to sharp gradients in pH, salinity, and temperature, which in turn, may affect the fitness of copepod populations inhabiting along the gradient. In fact, most of the studied copepod traits (egg size, ingestion, and egg production rates) were moderately (r 2 = 0.5, p < 0.05) to robustly (r 2 = 0.9, p < 0.05) explained by physical-chemical and biological (food abundance and composition) factors. Noteworthy was the negative relationship between low-pH waters and copepod reproductive outcomes. This effect was far evident in the estuarine area where small brood sizes and depleted egg production rates were significantly correlated with low seawater pH (r 2 = 0.6, p < 0.05). If short-term episodes of low-pH seawater constitute a significant threshold for reproduction, current findings should stimulate a better description of pH variability in coastal zones, as well as the study of biological consequences derived from the interaction between pH and others drivers on coastal marine populations.

KW - Copepods

KW - Freshwater

KW - Low pH

KW - Nearshore ecosystems

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U2 - 10.1007/s12237-013-9615-2

DO - 10.1007/s12237-013-9615-2

M3 - Comment/debate

AN - SCOPUS:84881556875

VL - 36

SP - 1084

EP - 1092

JO - Estuaries and Coasts

JF - Estuaries and Coasts

SN - 1559-2723

IS - 5

ER -