Stability of rocky intertidal communities, in response to species removal, varies across spatial scales

Oikos ◽  
2021 ◽  
Author(s):  
Nelson Valdivia ◽  
Daniela N. López ◽  
Eliseo Fica‐Rojas ◽  
Alexis M. Catalán ◽  
Moisés A. Aguilera ◽  
...  
Keyword(s):  
Spatial Scales ◽  
Rocky Intertidal ◽  
Intertidal Communities ◽  
Species Removal

Coastal upwelling may overwhelm the effect of sewage discharges in rocky intertidal communities of the Peruvian coast

2010 ◽  
Vol 61 (3) ◽  
pp. 309 ◽  
Author(s):  
Fausto N. Firstater ◽  
Fernando J. Hidalgo ◽  
Betina J. Lomovasky ◽  
Juan Tarazona ◽  
Georgina Flores ◽  
...  
Keyword(s):  
Community Development ◽  
Coastal Upwelling ◽  
Spatial Scales ◽  
Rocky Intertidal ◽  
Nutrient Concentrations ◽  
Intertidal Communities ◽  
Isotopic Signatures ◽  
Relative Contribution ◽  
Important Input ◽  
Early Succession

In coastal productive environments, such as upwelling systems, sewage effluents might represent an important input of nutrients affecting intertidal community development and structure. Using descriptive and experimental approaches, the community spatial variation and early succession in relation to a point-source effluent discharge in a rocky intertidal of an upwelling affected area (Ancón Bay, Peru) was analysed. The relative contribution of herbivory to the observed patterns was also analysed. Dissolved nutrient concentrations, macroalgal isotopic signatures and N content revealed a significant input of nutrients at the outfall, although this contribution was not reflected in the algal assemblage, but in higher abundances of mytilids, ophiuroids and limpets. Cover of most sessile organisms (biofilm, Ulva spp., mytilids and barnacles) varied among sites throughout early succession, and grazers only enhanced the cover of the red algae Gelidium spp. Differences in succession patterns could not be attributed to discharge effects. The results of this study suggest that the community development is bottom-up controlled in the entire bay, which is likely to be due to the upwelling that operates at larger temporal and spatial scales. If so, nutrient input derived from coastal upwelling may sometimes overwhelm the role of anthropogenic nutrient loadings in shaping intertidal communities.

scholarly journals Method for monitoring intertidal communities in a steep rocky shore: a combination of digital image technology and field operational strategy

2007 ◽  
Vol 55 (1) ◽  
pp. 19-27 ◽  
Author(s):  
Danuza Nogueira Moysés ◽  
Andréa de Oliveira R. Junqueira ◽  
Helena Passeri Lavrado ◽  
Sérgio Henrique Gonçalves da Silva
Keyword(s):  
Digital Image ◽  
Field Work ◽  
Benthic Invertebrate ◽  
Rocky Intertidal ◽  
Estimation Methods ◽  
Rocky Shores ◽  
Percent Cover ◽  
Intertidal Communities ◽  
Time Reproduction ◽  
Over Time

This paper introduces a method for temporal studies of steep rocky intertidal communities. It combines the use of digital image technology with field methodology, so that a wide area of the community can be sampled in a short time. Two current nondestructive percent cover estimation methods (visual estimation and point intersection) were compared in terms of cost, operational advantages and data quality, with a proposed method for a sucessional study . The proposed method used sequential photos to sample multiple fixed vertical transects over time. Reproduction of the mid-intertidal transect over time was possible by overlaying temporal transects in an image editing program. This method was similar to the point intersection quadrat method used to estimate percent cover. Benefits included reduced time on field work, economic advantages and other advantages of using digital photography, such as recording. Temporal photography of transects provided measurements of recruitment, mortality and population growth, and made it possible to manufacture an animation of sucessional stages. We suggest that this is the best method for providing information and understanding on the process of succession and for monitoring benthic invertebrate intertidal communities on steep rocky shores.

scholarly journals Interhemispheric consistency of scale-dependent spatial variation in the structure of intertidal rocky-shore communities

2018 ◽  
Author(s):  
Alexis Catalán ◽  
Nelson Valdivia ◽  
Ricardo Scrosati
Keyword(s):  
Community Structure ◽  
Spatial Variation ◽  
Spatial Scales ◽  
Vertical Gradient ◽  
Sampling Interval ◽  
Biological Variation ◽  
Rocky Intertidal ◽  
Vertical Variation ◽  
Horizontal Variation ◽  
Sampling Intervals

In rocky intertidal environments, the vertical gradient of abiotic stress generates, directly or indirectly, significant spatial variation in community structure. Along shorelines within biogeographic regions, abiotic changes also generate horizontal biological variation, which when measured at large sampling intervals may surpass vertical biological variation. Little is known, however, on how vertical variation compares with horizontal variation measured at multiple spatial scales in habitats with similar environmental conditions. Here, we compare spatial variability in rocky-intertidal communities between vertical stress gradients and three horizontal spatial scales (sampling interval) across habitats experiencing the same wave exposure on the Northwest Atlantic (NWA) and Southeast Pacific (SEP) coasts. For both regions, the vertical variation in species richness and composition (Raup-Crick and Bray-Curtis indices) was higher than the variation measured at all horizontal scales, from a few cm to hundreds of km. The patterns of variation in community structure matched those of abundance for the dominant sessile organisms, the foundation species Ascophyllum nodosum (seaweed) in NWA and Perumytilus purpuratus (mussel) in SEP. This interhemispheric comparison reveals the tight link between environmental and biological variation, indicating that studies comparing spatial scales of biological variation must consider the underlying environmental variation in addition to simply scale alone.

scholarly journals Interhemispheric consistency of scale-dependent spatial variation in the structure of intertidal rocky-shore communities

2018 ◽  
Author(s):  
Alexis Catalán ◽  
Nelson Valdivia ◽  
Ricardo Scrosati
Keyword(s):  
Community Structure ◽  
Spatial Variation ◽  
Spatial Scales ◽  
Vertical Gradient ◽  
Sampling Interval ◽  
Biological Variation ◽  
Rocky Intertidal ◽  
Vertical Variation ◽  
Horizontal Variation ◽  
Sampling Intervals

In rocky intertidal environments, the vertical gradient of abiotic stress generates, directly or indirectly, significant spatial variation in community structure. Along shorelines within biogeographic regions, abiotic changes also generate horizontal biological variation, which when measured at large sampling intervals may surpass vertical biological variation. Little is known, however, on how vertical variation compares with horizontal variation measured at multiple spatial scales in habitats with similar environmental conditions. Here, we compare spatial variability in rocky-intertidal communities between vertical stress gradients and three horizontal spatial scales (sampling interval) across habitats experiencing the same wave exposure on the Northwest Atlantic (NWA) and Southeast Pacific (SEP) coasts. For both regions, the vertical variation in species richness and composition (Raup-Crick and Bray-Curtis indices) was higher than the variation measured at all horizontal scales, from a few cm to hundreds of km. The patterns of variation in community structure matched those of abundance for the dominant sessile organisms, the foundation species Ascophyllum nodosum (seaweed) in NWA and Perumytilus purpuratus (mussel) in SEP. This interhemispheric comparison reveals the tight link between environmental and biological variation, indicating that studies comparing spatial scales of biological variation must consider the underlying environmental variation in addition to simply scale alone.

Are submarine groundwater discharges affecting the structure and physiological status of rocky intertidal communities?

2018 ◽  
Vol 136 ◽  
pp. 158-173 ◽  
Author(s):  
D. Piló ◽  
A.B. Barbosa ◽  
M.A. Teodósio ◽  
J. Encarnação ◽  
F. Leitão ◽  
...  
Keyword(s):  
Rocky Intertidal ◽  
Physiological Status ◽  
Intertidal Communities ◽  
Submarine Groundwater

scholarly journals REGIONAL-SCALE COMPOSITIONAL AND SIZE FIDELITY OF ROCKY INTERTIDAL COMMUNITIES FROM THE PATAGONIAN ATLANTIC COAST

Palaios ◽  
2015 ◽  
Vol 30 (8) ◽  
pp. 627-643 ◽  
Author(s):  
FERNANDO M. ARCHUBY ◽  
MARIANA ADAMI ◽  
JULIETA C. MARTINELLI ◽  
SANDRA GORDILLO ◽  
GABRIELA M. BORETTO ◽  
...  
Keyword(s):  
Atlantic Coast ◽  
Regional Scale ◽  
Rocky Intertidal ◽  
Intertidal Communities

Spatial and Temporal Variation in Rocky Intertidal Communities Along the Main Hawaiian Islands

2013 ◽  
Vol 67 (1) ◽  
pp. 23-45 ◽  
Author(s):  
Traci Erin Cox ◽  
Joanna Philippoff ◽  
Erin Baumgartner ◽  
Chela J. Zabin ◽  
Celia M. Smith
Keyword(s):  
Temporal Variation ◽  
Hawaiian Islands ◽  
Rocky Intertidal ◽  
Spatial And Temporal Variation ◽  
Intertidal Communities

scholarly journals Evaluating ecological states of rocky intertidal communities: A Best Professional Judgment exercise

2016 ◽  
Vol 60 ◽  
pp. 802-814 ◽  
Author(s):  
S.N. Murray ◽  
S.B. Weisberg ◽  
P.T. Raimondi ◽  
R.F. Ambrose ◽  
C.A. Bell ◽  
...  
Keyword(s):  
Rocky Intertidal ◽  
Professional Judgment ◽  
Intertidal Communities
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