Being young in a changing world: how temperature and salinity changes interactively modify the performance of larval stages of the barnacle Amphibalanus improvisus

The fate of key species, such as the barnacle Amphibalanus improvisus, in the course of global change is of particular interest since any change in their abundance and/or performance may entail community-wide effects. In the fluctuating Western Baltic, species typically experience a broad range of environmental conditions, which may preselect them to better cope with climate change. In this study, we examined the sensitivity of two crucial ontogenetic phases (naupliar, cypris) of the barnacle toward a range of temperature (12, 20, and 28°C) and salinity (5, 15, and 30 psu) combinations. Under all salinity treatments, nauplii developed faster at intermediate and high temperatures. Cyprid metamorphosis success, in contrast, was interactively impacted by temperature and salinity. Survival of nauplii decreased with increasing salinity under all temperature treatments. Highest settlement rates occurred at the intermediate temperature and salinity combination, i.e., 20°C and 15 psu. Settlement success of "naive" cyprids, i.e., when nauplii were raised in the absence of stress (20°C/15 psu), was less impacted by stressful temperature/salinity combinations than that of cyprids with a stress history. Here, settlement success was highest at 30 psu particularly at low and high temperatures. Surprisingly, larval survival was not highest under the conditions typical for the Kiel Fjord at the season of peak settlement (20°C/15 psu). The proportion of nauplii that ultimately transformed to attached juveniles was, however, highest under these "home" conditions. Overall, only particularly stressful combinations of temperature and salinity substantially reduced larval performance and development. Given more time for adaptation, the relatively smooth climate shifts predicted will probably not dramatically affect this species.

Latitude 19,̊ a romance of the West Indies in the year of Our Lord eighteen hundred and twenty; being a faithful account and true, of the painful adventures of the skipper, the bo's'n, the smith, the mate, and Cynthia;

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The law relating to the duties on land values and mineral rights and to the valuation of the same , being part I of the Finance (1909-1910) act, 1910, with the incorporated enactments, full explanatory notes and a practical introduction

Half-title: Konstam's law of land values.

Catholicism with freedom: an appeal for a new policy: being a paper read at the Anglo-Catholic Congress at Birmingham .../

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Education reform; being the report of the Education Reform Council.

William Garnett, chairman.

Coach Bennie Oosterbaan being carried off the field at 1951 Rose Bowl.

[[#26 Peter Palmer, #89 Fred Pickard, #79 John Hess]