Response of intertidal barnacles to air temperature: Long-term monitoring and in-situ measurements

Little, Colin; Trowbridge, Cynthia D.; Williams, Gray A.; Hui, Tin Yan; Pilling, Graham M.; Morritt, David; Stirling, Penny

doi:10.1016/j.ecss.2021.107367

Cited by 7 publications

(3 citation statements)

References 99 publications

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“…These expressions of temperature are not necessarily coupled, as SST refers to seawater temperature (which intertidal organisms experience at high tide) while MaxT and MinT may take place during aerial exposure at low tide, as the air can be warmer or colder than SST (Høgslund et al, 2014). Thus, these three temperature expressions are valuable to understand community patterns (Helmuth et al, 2002;Fenberg et al, 2015;Mota et al, 2015;Rodrigues et al, 2019;Wang et al, 2020;Little et al, 2021). These daily values are freely available through the data paper by .…”

Section: Environmental Datamentioning

confidence: 99%

“…Finally, we looked for mensurative evidence on possible drivers underlying these spatiotemporal patterns, focusing on a set of variables that are often considered as environmental and biological filters. Our third objective was thus to evaluate how temperature (Lathlean et al, 2014;Little et al, 2021), pelagic food supply (Menge et al, 1997), ice load (Petzold et al, 2014), and species associations (Lany et al, 2017) were related to the observed biogeographic patterns.…”

Section: Introductionmentioning

confidence: 99%

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Biogeography of algae and invertebrates from wave-exposed rocky intertidal habitats along the Atlantic coast of Nova Scotia (Canada): Latitudinal and interannual patterns and possible underlying drivers

Scrosati

Freeman²,

Ellrich³

et al. 2022

Front. Mar. Sci.

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Biogeographic studies aim to understand species distributions and are becoming increasingly relevant to establish baselines to monitor ecological change. The NW Atlantic coast hosts a cold-temperate biota, although knowledge about its biogeography is patchy. This study documents for the first time biogeographic variation at mid-to-high intertidal elevations in wave-exposed rocky intertidal habitats along the open Atlantic coast of Nova Scotia (Canada), a hydrographically distinct subregion of this cold-temperate region. For this goal, we measured the summer abundance of algae and invertebrates at the same nine locations over four consecutive years (2014 to 2017) spanning 415 km of coastline, which allowed us to examine latitudinal and interannual patterns. In addition, we looked for mensurative evidence on possible drivers underlying these patterns, focusing on sea surface temperature, daily maximum and minimum temperature (which often happen at low tides at thus differ from sea surface temperature), pelagic food supply for intertidal filter-feeders (phytoplankton abundance and particulate organic carbon), drift sea ice during the cold season (which can cause intertidal disturbance), and species associations. Our field surveys revealed that northern locations can be severely disturbed by ice scour when drift ice is abundant and, while biological recolonization occurs over the years, it differs in pace among locations. Southern locations, instead, did not experience ice scour during our study and, thus, generally exhibited a higher species richness and abundance than northern locations. Multivariate analyses indicated that the aforementioned expressions of temperature and pelagic food supply explained together 32–55% of the variation in alongshore biogeographic pattern, depending on the year. Species association analyses suggest that algal foundation species (generally more abundant at southern locations) contribute to increase location-wise species richness. Mensurative evidence for bottom-up forcing in seaweed–herbivore and filter-feeder–predator systems differed greatly among years. Overall, in addition to its inherent value to advance NW Atlantic intertidal biogeography, our species distribution database should be valuable to assess ecological change decades into the future as climate change and other anthropogenic influences unfold.

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Section: Environmental Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biogeography of algae and invertebrates from wave-exposed rocky intertidal habitats along the Atlantic coast of Nova Scotia (Canada): Latitudinal and interannual patterns and possible underlying drivers

Scrosati

Freeman²,

Ellrich³

et al. 2022

Front. Mar. Sci.

View full text Add to dashboard Cite

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“…While historically considered robust, the resilience of rocky intertidal communities is beginning to erode due to repeated thermal disturbance, among other stressors (Menge et al 2022). Declines in barnacle abundance and increases in barnacle mortality have been attributed to increases in temperature (Little et al 2021) and heatwaves (Hesketh and Harley 2023), which can also impact the diversity, composition, and organism abundance in barnacle-associated communities (Kordas et al 2015, Hesketh andHarley 2023).…”

Section: Introductionmentioning

confidence: 99%

The effect of single versus successive warm summers on an intertidal community

Hesketh,

Konecny,

Emry

et al. 2024

Preprint

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To accurately predict how organisms and ecological communities will respond to future conditions caused by climate change, we must consider the temporal dimension of environmental stressors, including the effects of repeated exposures to stress. We performed a two-year passive warming experiment in coastal British Columbia to explore the response of intertidal communities to single and successive warm summers. Elevated summertime temperatures tended to reduce the abundance of barnacles and grazers, algal cover, and alpha diversity compared to ambient temperatures, and both contemporaneous and persistent effects of warming were detected. While elevated summer temperatures appeared to have direct effects on organism survival and growth, the persistent effects of warming through time and differences in community structure between treatments were likely mediated by differences in foundation species (barnacle) abundance between treatments. Unexpectedly, the effects of thermal stress in year two were rarely dependent on whether there had been thermal stress in year one. Our study suggests that, while barnacle beds can recover from single warm summers, recurring thermal stress will result in a more depauperate, less diverse community over time, particularly if foundation species are negatively affected.

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