Female Copepods Help Their Offspring Survive OA and Warming
Vehmaa, A., Brutemark, A. and Engstrom-Ost, J. 2012. Maternal effects may act as an adaptation mechanism for copepods facing pH and temperature changes. PLOS ONE 7: e48538.
In the present study, Vehmaa et al. "tested the reproductive response of Acartia sp. calanoid copepods and the importance of maternal effects in determining the offspring quality in a changing environment according to a 2100 climate scenario of a pH decline by 0.4 unit and a temperature elevation of 3°C." This they did by monitoring the egg production of copepods incubated in four different pH and temperature conditions for five consecutive days, and on days 1, 3 and 5 dividing the eggs and allowing them to hatch in either the same or in different conditions than those in which they were produced.
Discussing their findings, the three Finnish researchers report that "higher production temperature induced a positive maternal effect resulting in faster hatching and indicating that the mothers can invest more in their eggs, and therefore produce better quality eggs." In addition, they further note, in this regard, that the similar studies of Karell et al. (2008) and Jonasdottir et al. (2009) showed how "the egg quality in terms of maternal immunological or nutritional provisioning improved," and they suggest that this phenomenon may explain "the declining effect of pH difference on egg hatching."
Taken together, Vehmaa et al. conclude that these several observations demonstrate that maternal effects "are an important mechanism in the face of environmental change." Indeed, it would appear that they can actually spell the difference between extinction and survival in situations such as those that are typically forecast for earth's near future by the world's climate alarmists.
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