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Riascos, José M; Carstensen, Daniel; Laudien, Jürgen; Arntz, Wolf E; Oliva, Marcelo; Güntner, Andreas; Heilmayer, Olaf (2009): Gametogenic cycle of Mesodesma donacium [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.838250, Supplement to: Riascos, JM et al. (2009): Thriving and declining: climate variability shaping life-history and population persistence of Mesodesma donacium in the Humboldt Upwelling System. Marine Ecology Progress Series, 385, 151-163, https://doi.org/10.3354/meps08042

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Abstract:
Large-scale environmental patterns in the Humboldt Current System (HCS) show major changes during strong El Niño episodes, leading to the mass mortality of dominant species in coastal ecosystems. Here we explore how these changes affect the life-history traits of the surf clam Mesodesma donacium. Growth and mortality rates under normal temperature and salinity were compared to those under anomalous (El Niño) higher temperature and reduced salinity. Moreover, the reproductive spatial-temporal patterns along the distribution range were studied, and their relationship to large-scale environmental variability was assessed. M. donacium is highly sensitive to temperature changes, supporting the hypothesis of temperature as the key factor leading to mass mortality events of this clam in northern populations. In contrast, this species, particularly juveniles, was remarkably tolerant to low salinity, which may be related to submarine groundwater discharge in Hornitos, northern Chile. The enhanced osmotic tolerance by juveniles may represent an adaptation of early life stages allowing settlement in vacant areas at outlets of estuarine areas. The strong seasonality in freshwater input and in upwelling strength seems to be linked to the spatial and temporal patterns in the reproductive cycle. Owing to its origin and thermal sensitivity, the expansion and dominance of M. donacium from the Pliocene/Pleistocene transition until the present seem closely linked to the establishment and development of the cold HCS. Therefore, the recurrence of warming events (particularly El Niño since at least the Holocene) has submitted this cold-water species to a continuous local extinction-recolonization process.
Project(s):
Climate variability and El Niño Southern Oscillation (CENSOR)
Funding:
Sixth Framework Programme (FP6), grant/award no. 511071: Climate variability and El Niño Southern Oscillation
Coverage:
Median Latitude: -30.965600 * Median Longitude: -72.060050 * South-bound Latitude: -43.383300 * West-bound Longitude: -74.200000 * North-bound Latitude: -16.606000 * East-bound Longitude: -70.290300
Date/Time Start: 1969-08-15T00:00:00 * Date/Time End: 2007-04-15T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
7 datasets

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Datasets listed in this publication series

  1. Salgado, I; Ishiyama, V (1974): Gametogenic cycle of Mesodesma donacium in Camaná, Arequipa, Peru, March 1973 to February 1974. https://doi.org/10.1594/PANGAEA.695907
  2. Rubilar, P; Ariz, L; Ojeda, V et al. (2001): Gametogenic cycle of Mesodesma donacium in Cucao and Quilanlar, Chile, September 2000 to August 2001. https://doi.org/10.1594/PANGAEA.695934
  3. Riascos, JM; Laudien, J; Heilmayer, O (2009): Gametogenic cycle of Mesodesma donacium in Hornitos (II Región), Chile, May 2005 to April 2007. https://doi.org/10.1594/PANGAEA.695933
  4. Tarifeño-Silva, E (1980): Gametogenic cycle of Mesodesma donacium in La Laguna Beach - V Región, Chile, August 1969 to November 1970. https://doi.org/10.1594/PANGAEA.695935
  5. Jerez, G; Aris, L; Brown, D et al. (1995): Gametogenic cycle of Mesodesma donacium in Longotoma, Chile, June 1994 to July 1995. https://doi.org/10.1594/PANGAEA.695913
  6. Jerez, G; Aris, L; Brown, D et al. (1995): Gametogenic cycle of Mesodesma donacium in Peñuelas, Chile, June 1994 to July 1995. https://doi.org/10.1594/PANGAEA.838248
  7. Filun, LO (2008): Gametogenic cycle of Mesodesma donacium in Mehuin beach, Valdivia, Chile, July 1989 to June 1991. https://doi.org/10.1594/PANGAEA.695910