Overgrowth patterns of the red algae Furcellaria lumbricalis at an exposed Baltic Sea coast: The results of a remote underwater video data analysis

Bučas, Martynas; Daunys, Darius; Olenin, Sergej

doi:10.1016/j.ecss.2007.04.038

Cited by 29 publications

(17 citation statements)

References 30 publications

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“…Small rocks are known to be more sensitive to overturning and scouring as a result of physical disturbance than larger substrates (Gedan et al, 2011), and therefore, a low frequency of species occurrence on this substrate is understandable (this tendency was recorded in our observations). Similar to the previous studies, we observed that a lower percentage of faunal coverage of rock surfaces was recorded within smaller boulders as a result of limitations of space for colonization and higher rate of mortality caused by disturbances, especially when they were surrounded by mobile sediment (Sousa, 1979;Bučas et al, 2007). Similarly to our results (Fig.…”

Section: Discussionsupporting

confidence: 82%

“…The significant differences between assemblages from hydrolittoral and littoral sites of similar salinity could be due to the contribution of the general sediment characteristics at sampling sites and the way rocks are oriented on the sediment. The properties of the substrate and surrounding sediment can influence flora and fauna occurrence at the hard bottom (Bučas et al, 2007). Comparison of relative frequencies of occurrence of encrusting species in hydrolittoral and littoral samples in relation to the rock size indicated that this was lowest for small rocks in the shallow hydrolittoral.…”

Section: Discussionmentioning

confidence: 99%

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Spatial pattern of hydrolittoral rock encrusting assemblages along the salinity gradient of the Baltic Sea

Grabowska

Kukliński

2015

Hydrobiologia

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This study compared the diversity parameters and structures of encrusting assemblages in two habitats situated at two levels of shallow rocky shore: hydrolittoral and littoral along the Baltic Sea system. We investigated the variability and level of distinctiveness of the hydrolittoral encrusting fauna based on species biodiversity and distribution, and compared these features with those of communities inhabiting the adjacent shallow littoral zone (3-m depth). Structural similarities and differences between the encrusting assemblages from adjacent hydrolittoral and littoral zones were studied within 14 locations distributed along the northern coastline of the Baltic Sea. Multivariate analysis indicates that salinity had the greatest influence on the structure of the investigated assemblages. Most of the observed hydrolittoral assemblages contained the same species as the littoral zone. This result indicated a shared common species pool with similar large-scale patterns of species distributions with some variability in the dominating species between zones. The similarity between species composition of the hydrolittoral and littoral assemblages decreased with increase of salinity. Additionally, with higher species richness and the occurrence of marine specialists adapted to hydrolittoral conditions, the role of the rock size in the frequency of species occurrence and assemblage diversity was less significant.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Spatial pattern of hydrolittoral rock encrusting assemblages along the salinity gradient of the Baltic Sea

Grabowska

Kukliński

2015

Hydrobiologia

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“…The local effects of climate change include increased wind and glacial melt, and the resulting increased siltation (Thrush et al 2004; unpublished reports from IOPAS) leads to a reduction in the euphotic zone. This, in turn, creates an upward shift of macrophytobenthos as has been observed along Baltic shores (Bucas et al 2007). The increased fine sediment captured by bushy, intertidal algae creates habitats for small sediment- (Reichert and Buchholz 2006).…”

Section: Discussionmentioning

confidence: 89%

Increase in biodiversity in the arctic rocky littoral, Sorkappland, Svalbard, after 20 years of climate warming

2010

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Rocky littoral macroorganisms that live between the high and low water marks were sampled in the summers of 1988 and 2007-2008 in Hornsund Fjord and along the adjacent Sorkappland coast (76-77°N). The same sampling stations and methodology were used to collect the samples. Over the last 20 years, the study area has been exposed to well-documented increases in air and sea temperature, increased windiness, and marked decreases in both the duration and extent of sea ice cover. The study revealed a twofold increase in the number of species found intertidally, a threefold increase in the biomass of macrophytes, and an upward shift in algae occurrence on the coast. Subarctic boreal species occupied new areas, while arctic species retreated. There were no species new to the area in 2007-2008, and all newcomers to the intertidal zone were noted in 1988 in the sublittoral zone. The relative stability of intertidal flora and fauna after 20 years is explained by the fact that the warm Atlantic waters (the main warming agent) are distant from the Sorkappland coast. Current observations show a marked change in the coastal belt biocenosis.

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“…Boulder size did not appear to affect algae, which may be due to the rapid recruitment rate of these opportunistic filamentous species (Kiirikki and Lehvo, 1997;Kraufvelin et al, 2006) causing them to recover quickly following any disturbance associated with boulder size (McGuinness, 1987a;Bucas et al, 2007). There was, however, evidence of the "monk's head" pattern occurring, typically associated with instability of small boulders (Addessi, 1994).…”

Section: Discussionmentioning

confidence: 99%

Disturbance-related patterns in unstable rocky benthic habitats of the north-eastern Baltic coast

Liversage¹,

Kotta²

2015

Proc. Estonian Acad. Sci.

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Abstract. Distinct patterns of benthic flora and fauna are produced when unstable rocky substrata are disturbed by water motion. This study investigated occurrence of disturbance-related patterns in benthic boulder habitats on the north-eastern Baltic coast. Sessile assemblages, mostly algae on tops of boulders and barnacles and bryozoans underneath, were found to differ between small (50-150 cm 2 upperside surface area) and large (200-800 cm 2 ) boulders. Densities of motile gammaridean amphipods were negatively correlated with boulder size. These patterns may be due to small boulders being displaced by water motion more frequently than large ones. Most of the barnacle shells/tests were remnant empty ones, and the proportion of empty tests and living barnacles was similar underneath small and large boulders, suggesting that degradation/removal of empty tests was not influenced by disturbance associated with boulder size. There was no consistent evidence of algae being affected by boulder size, but the tops of boulders had less algae than the edges, a pattern that is typically associated with high rates of overturning. Confirmation of disturbance as having caused these patterns and thus being an important process for structuring benthic biota in this region could be achieved by further manipulative experimentation.

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Overgrowth patterns of the red algae Furcellaria lumbricalis at an exposed Baltic Sea coast: The results of a remote underwater video data analysis

Cited by 29 publications

References 30 publications

Spatial pattern of hydrolittoral rock encrusting assemblages along the salinity gradient of the Baltic Sea

Spatial pattern of hydrolittoral rock encrusting assemblages along the salinity gradient of the Baltic Sea

Increase in biodiversity in the arctic rocky littoral, Sorkappland, Svalbard, after 20 years of climate warming

Disturbance-related patterns in unstable rocky benthic habitats of the north-eastern Baltic coast

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