scholarly journals Ecology of Preimaginal Culicine Mosquitoes in Rock Pools on Inselbergs Within Kaduna State, Nigeria

2019 ◽  
Author(s):  
O.A. Obi ◽  
I.H. Nock ◽  
D.A. Adebote
Keyword(s):  
Rock Pools

Calcareous meiofauna associated with the calcareous alga Corallina officinalis on bedrock and boulder-field shores of Ceredigion, Wales, UK

2020 ◽  
pp. 1-13
Author(s):  
Brent Wilson ◽  
Lee-Ann C. Hayek
Keyword(s):  
Breaking Waves ◽  
Red Alga ◽  
Low Energy ◽  
Rock Pools ◽  
Lower Shore ◽  
Calcareous Alga ◽  
Corallina Officinalis ◽  
Modes Of Life ◽  
Sessile Organisms

Abstract The intertidal coastline of Ceredigion, Wales, comprises a patchwork of unstable sand and cobble beaches, and stable bedrock areas and boulder-fields. The last two shoreline types support rock-pools with growths of the red alga Corallina officinalis, the thalli of which are a popular substrate for calcareous epiphytes. Replicate samples of C. officinalis (four per site) were taken from (a) three bedrock sites (Ceinewydd, Aberystwyth Victoria Rocks and Castle Rocks) and (b) three boulder-fields (Llanon, Aberaeron lower shore (Aberaeron LS), Llanina) on the lower shore. The middle shore boulder field at Aberaeron (Aberaeron MS) was also sampled. These replicates were examined for calcareous meiofauna (63–2000 μm) not previously examined as a community: spirorbids, foraminifera, gastropods, bryozoans, ostracods and ophiuroids. These were assigned to sessile and vagile modes of life. The sessile association overwhelmingly dominated bedrock coastlines and the Aberaeron MS, while the vagile association was at its most abundant on the Corallina from lower shore, stable boulder-fields. Gastropods were almost entirely limited to Corallina on boulder-fields. We hypothesize that the boulders induce low-energy turbulence among breaking waves, allowing the less firmly attached vagile meiofauna to dominate on C. officinalis in rock-pools in lower shore boulder-fields. The small attachment area of sessile organisms allows them to settle bedrock sites in greater densities than do vagile organisms at boulder-field sites, which are presumed to require larger foraging areas.

scholarly journals Shelving the Coast With Vertipools: Retrofitting Artificial Rock Pools on Coastal Structures as Mitigation for Coastal Squeeze

2019 ◽  
Vol 6 ◽  
Author(s):  
Alice E. Hall ◽  
Roger J. H. Herbert ◽  
J. Robert Britton ◽  
Ian M. Boyd ◽  
Nigel C. George
Keyword(s):  
Rock Pools ◽  
Coastal Structures ◽  
Artificial Rock ◽  
Coastal Squeeze

Vegetation of seasonal rock pools on inselbergs situated in the savanna zone of the Ivory Coast (West Africa)

Flora ◽  
2000 ◽  
Vol 195 (3) ◽  
pp. 257-266 ◽  
Author(s):  
Axel Krieger ◽  
Stefan Porembski ◽  
Wilhelm Barthlott
Keyword(s):  
West Africa ◽  
Ivory Coast ◽  
Rock Pools ◽  
Savanna Zone

Monitoring of small rock pools reveals differential effects of chronic anthropogenic disturbance on birds and mammals in the Calakmul region, southern Mexico

2021 ◽  
pp. 1-10
Author(s):  
Carlos M. Delgado-Martínez ◽  
Fredy Alvarado ◽  
Melanie Kolb ◽  
Eduardo Mendoza
Keyword(s):  
Species Richness ◽  
Anthropogenic Disturbance ◽  
Forest Cover ◽  
Biosphere Reserve ◽  
Bird Diversity ◽  
Small Scale ◽  
Rock Pools ◽  
Southern Mexico ◽  
Wildlife Species ◽  
The Impact

Abstract Great attention has been drawn to the impacts of habitat deforestation and fragmentation on wildlife species richness. In contrast, much less attention has been paid to assessing the impacts of chronic anthropogenic disturbance on wildlife species composition and behaviour. We focused on natural small rock pools (sartenejas), which concentrate vertebrate activity due to habitat’s water limitation, to assess the impact of chronic anthropogenic disturbance on the species richness, diversity, composition, and behaviour of medium and large-sized birds and mammals in the highly biodiverse forests of Calakmul, southern Mexico. Camera trapping records of fauna using sartenejas within and outside the Calakmul Biosphere Reserve (CBR) showed that there were no effects on species richness, but contrasts emerged when comparing species diversity, composition, and behaviour. These effects differed between birds and mammals and between species: (1) bird diversity was greater outside the CBR, but mammal diversity was greater within and (2) the daily activity patterns of birds differed slightly within and outside the CBR but strongly contrasted in mammals. Our study highlights that even in areas supporting extensive forest cover, small-scale chronic anthropogenic disturbances can have pervasive negative effects on wildlife and that these effects contrast between animal groups.

Pools of resilience

2021 ◽  
Author(s):  
David Abrego ◽  
Andrew H Baird ◽  
Emily Howells ◽  
Stephen DA Smith
Keyword(s):  
Climate Change ◽  
Climate Change Adaptation ◽  
Coral Species ◽  
Scleractinian Corals ◽  
Rock Pools ◽  
Southeastern Australia ◽  
Extreme Habitat

We describe an extreme habitat for scleractinian corals in intertidal rock pools of southeastern Australia. The pools host a small but hardy subset of coral species despite experiencing conditions beyond those documented for corals anywhere in Australia. Understanding mechanisms behind this may improve insights into climate change adaptation in corals.

Size and shape ofDaphnia longispina in rock-pools

Hydrobiologia ◽  
1987 ◽  
Vol 145 (1) ◽  
pp. 259-268 ◽  
Author(s):  
Esa Ranta ◽  
Sara Tjossem
Keyword(s):  
Rock Pools ◽  
Size And Shape

scholarly journals The Effects of the Invasive Seaweed Asparagopsis Armata on Native Rock Pool Communities: Evidences from Experimental Exclusion

2020 ◽  
Author(s):  
Carla Silva ◽  
Marco Lemos ◽  
Rui Gaspar ◽  
Carlos Gonçalves ◽  
João Neto
Keyword(s):  
Algal Species ◽  
Taxonomic Composition ◽  
Habitat Destruction ◽  
Rock Pools ◽  
Red Macroalgae ◽  
Invasive Seaweed ◽  
Shallow Subtidal ◽  
Intertidal Seaweed ◽  
Macroalgal Assemblage ◽  
Asparagopsis Armata

Biological invasions represent a threat to ecosystems, through competition and habitat destruction, which may result in significant changes of the invaded community. Asparagopsis armata is a red macroalgae (Rodophyta) globally recognized as an invasive species. It is found from the intertidal to shallow subtidal areas, on rock or epiphytic, forming natural vegetation belts on exposed coasts. This study evaluated the variations on native intertidal seaweed and macroinvertebrate assemblages inhabiting rock pools with and without the presence of the invasive macroalgae A. armata. To achieve this, manipulation experiments on Atlantic (Portugal) rock pools were done. Three rock pools were maintained without A. armata by manual removal of macroalgae, and three others were not experimentally manipulated during the study period and A. armata was freely present. In this study the variations between different rock pools were assessed. Results showed different patterns in the macroalgae composition of assemblages but not for the macrobenthic communities. Ellisolandia elongata was the main algal species affected by the invasion of A. armata. Invaded pools tended to show less species richness, showing a more constant and conservative structure, with lower variation of its taxonomic composition than the pools not containing A. armata, where the variability between samples was always higher. Despite the importance of the achieved results, further data based on observation of long-term series are needed, in order to further understand more severe effects of the invader A. armata on native macroalgal assemblage.

scholarly journals Trait evolution under multiple selection pressures: Prey responses to predictable and unpredictable variation

2019 ◽  
Author(s):  
Manvi Sharma ◽  
Kavita Isvaran
Keyword(s):  
Variable Selection ◽  
Predation Risk ◽  
Selection Pressure ◽  
Spatial And Temporal Variation ◽  
Rock Pools ◽  
Selection Pressures ◽  
Space And Time ◽  
Natural Settings ◽  
Oviposition Sites ◽  
Desiccation Risk

AbstractWhen a strong selection pressure, such as predation risk, varies widely in space and time, how should prey respond? When risk varies predictably, prey are hypothesized to respond in a risk-sensitive manner. It is less clear how prey should respond when risk varies unpredictably.Additionally, prey response may also depend on how predation risk interacts with other selection pressures. Our understanding of the complex action of multiple and variable selection pressures on prey traits is still comparatively poor. Here, we examine how predictable and unpredictable aspects of predation risk act together with another important selection pressure to influence prey behaviour in the rock pool breeding mosquito, Aedes vexans. Through the selection of sites for oviposition, female mosquitoes can influence the predation risk faced by their offspring. We tested how females select oviposition sites, when encountering pools that vary in larval predation risk and desiccation risk. We comprehensively quantified spatial and temporal variation in predation risk by measuring densities of predatory dragonfly nymphs in rock pools of different sizes, along the mosquito breeding season. We also measured hydroperiod length. We next conducted manipulative experiments in rock pools and measured female oviposition responses to variation in predation and desiccation risks. Predation risk varied widely in space and time. Desiccation risk only appeared important for the small pools. Ovipositing females appeared to respond to these multiple aspects of variation in selection pressures. Females seemed to respond to predictable variation by avoiding large pools that permanently harboured predators in natural settings. Female responses were more variable to medium-sized pools with naturally stochastic predator densities, highlighting the role of unpredictability in predation risk in shaping behaviour. Females did not clearly prefer small pools that were naturally devoid of predators but carried high desiccation risk, suggesting that they balance multiple risks – predation versus desiccation – when choosing oviposition sites. Our study suggests that wild populations may commonly experience multiple and variable selection pressures that can favour seemingly puzzling trait variation. We highlight the need to quantify variation in selection pressures and investigate how such variation, especially the unpredictable aspects, shapes prey traits.

The effect of tadpoles on algal growth in temporary, rain-filled rock pools

1985 ◽  
Vol 15 (1) ◽  
pp. 77-87 ◽  
Author(s):  
P. L. OSBORNE ◽  
A. J. McLACHLAN
Keyword(s):  
Algal Growth ◽  
Rock Pools
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