scholarly journals Differential recolonization of Atlantic intertidal habitats after disturbance reveals potential bottom-up community regulation

F1000Research ◽  
2014 ◽  
Vol 3 ◽  
pp. 247 ◽  
Author(s):  
Willy Petzold ◽  
Ricardo A. Scrosati
Keyword(s):  
Atlantic Coast ◽  
Early Summer ◽  
Rocky Intertidal ◽  
Intertidal Communities ◽  
Bottom Up ◽  
Community Regulation ◽  
Intertidal Habitats ◽  
Underlying Mechanisms ◽  
Main Food Source ◽  
Coastal Phytoplankton

In the spring of 2014, abundant sea ice that drifted out of the Gulf of St. Lawrence caused extensive disturbance in rocky intertidal habitats on the northern Atlantic coast of mainland Nova Scotia, Canada. To monitor recovery of intertidal communities, we surveyed two wave-exposed locations in the early summer of 2014. Barnacle recruitment and the abundance of predatory dogwhelks were low at one location (Tor Bay Provincial Park) but more than 20 times higher at the other location (Whitehead). Satellite data indicated that the abundance of coastal phytoplankton (the main food source for barnacle larvae) was consistently higher at Whitehead just before the barnacle recruitment season, when barnacle larvae were in the water column. These observations suggest bottom-up forcing of intertidal communities. The underlying mechanisms and their intensity along the NW Atlantic coast could be investigated through studies done at local and regional scales.

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

TOP-DOWN AND BOTTOM-UP REGULATION OF NEW ZEALAND ROCKY INTERTIDAL COMMUNITIES

1999 ◽  
Vol 69 (3) ◽  
pp. 297-330 ◽  
Author(s):  
Bruce A. Menge ◽  
Bryon A. Daley ◽  
Jane Lubchenco ◽  
Eric Sanford ◽  
Elizabeth Dahlhoff ◽  
...  
Keyword(s):  
New Zealand ◽  
Rocky Intertidal ◽  
Intertidal Communities ◽  
Top Down ◽  
Bottom Up

scholarly journals Barnacle recruit density and size increase from high to middle intertidal elevations in wave-exposed habitats on the Atlantic coast of Nova Scotia

2019 ◽  
Author(s):  
Ricardo A Scrosati
Keyword(s):  
Nova Scotia ◽  
Interspecific Interactions ◽  
Atlantic Coast ◽  
Rocky Intertidal ◽  
Ne Atlantic ◽  
Relevant Role ◽  
Ne Pacific ◽  
Intertidal Habitats ◽  
High Elevations ◽  
Intertidal Environments

Barnacle recruitment is often studied in rocky intertidal habitats due to the relevant role that barnacles can play in intertidal communities. In 2014, barnacle (Semibalanus balanoides) recruitment was measured at high elevations in wave-exposed intertidal habitats on the NW Atlantic coast in Nova Scotia, Canada. Values were considerably lower than previously reported for middle elevations in wave-exposed intertidal habitats on the NE Atlantic and NE Pacific coasts. To determine if such differences in recruitment may have resulted from elevation influences, I did a field experiment in 2019 in wave-exposed intertidal habitats in Nova Scotia to test the hypothesis that recruitment is higher at middle than at high elevations, based on known environmental differences between both elevation zones. Based on data from three locations spanning 158 km of the Nova Scotia coast, barnacle recruitment was, on average, nearly 200 % higher (and recruits were larger) at middle than at high elevations. However, even with this increase, barnacle recruitment on this NW Atlantic coast is still lower than for comparable habitats on the NE Atlantic and NE Pacific coasts, and also lower than previously reported for wave-exposed locations farther south on the NW Atlantic coast, in Maine, USA. Therefore, barnacle recruitment in wave-exposed intertidal environments in Nova Scotia appears to be only moderate relative to other shores. This difference in the supply of barnacle recruits might influence the intensity of interspecific interactions involving barnacles.

scholarly journals Changes in barnacle recruitment and recruit body size with intertidal elevation on wave-exposed rocky shores in Nova Scotia

2019 ◽  
Author(s):  
Ricardo A. Scrosati
Keyword(s):  
Nova Scotia ◽  
Interspecific Interactions ◽  
Atlantic Coast ◽  
Rocky Intertidal ◽  
Rocky Shores ◽  
Ne Atlantic ◽  
Relevant Role ◽  
Ne Pacific ◽  
Intertidal Habitats ◽  
High Elevations

AbstractBarnacle recruitment is often studied in rocky intertidal habitats due to the relevant role that barnacles can play in intertidal communities. In 2014, barnacle (Semibalanus balanoides) recruitment was measured at high elevations in wave-exposed intertidal habitats on the NW Atlantic coast in Nova Scotia, Canada. Values were considerably lower than previously reported for middle elevations in wave-exposed intertidal habitats on the NE Atlantic and NE Pacific coasts. To determine if such differences in recruitment may have resulted from elevation influences, I did a field experiment in 2019 in wave-exposed intertidal habitats in Nova Scotia to test the hypothesis that recruitment is higher at middle than at high elevations, based on known environmental differences between both elevation zones. Based on data from three locations spanning 158 km of the Nova Scotia coast, barnacle recruitment was, on average, nearly 200 % higher (and recruits were larger) at middle than at high elevations. However, even with this increase, barnacle recruitment on this NW Atlantic coast is still lower than for comparable habitats on the NE Atlantic and NE Pacific coasts, and also lower than previously reported for wave-exposed locations farther south on the NW Atlantic coast, in Maine, USA. Therefore, barnacle recruitment in wave-exposed intertidal environments in Nova Scotia appears to be only moderate relative to other shores. This difference in the supply of barnacle recruits might influence the intensity of interspecific interactions involving barnacles.

scholarly journals Benthic-pelagic links and rocky intertidal communities: Bottom-up effects on top-down control?

1997 ◽  
Vol 94 (26) ◽  
pp. 14530-14535 ◽  
Author(s):  
B. A. Menge ◽  
B. A. Daley ◽  
P. A. Wheeler ◽  
E. Dahlhoff ◽  
E. Sanford ◽  
...  
Keyword(s):  
Rocky Intertidal ◽  
Intertidal Communities ◽  
Top Down ◽  
Bottom Up

scholarly journals Barnacle recruit density and size increase from high to middle intertidal elevations in wave-exposed habitats on the Atlantic coast of Nova Scotia

2019 ◽  
Author(s):  
Ricardo A Scrosati
Keyword(s):  
Nova Scotia ◽  
Interspecific Interactions ◽  
Atlantic Coast ◽  
Rocky Intertidal ◽  
Ne Atlantic ◽  
Relevant Role ◽  
Ne Pacific ◽  
Intertidal Habitats ◽  
High Elevations ◽  
Intertidal Environments

Barnacle recruitment is often studied in rocky intertidal habitats due to the relevant role that barnacles can play in intertidal communities. In 2014, barnacle (Semibalanus balanoides) recruitment was measured at high elevations in wave-exposed intertidal habitats on the NW Atlantic coast in Nova Scotia, Canada. Values were considerably lower than previously reported for middle elevations in wave-exposed intertidal habitats on the NE Atlantic and NE Pacific coasts. To determine if such differences in recruitment may have resulted from elevation influences, I did a field experiment in 2019 in wave-exposed intertidal habitats in Nova Scotia to test the hypothesis that recruitment is higher at middle than at high elevations, based on known environmental differences between both elevation zones. Based on data from three locations spanning 158 km of the Nova Scotia coast, barnacle recruitment was, on average, nearly 200 % higher (and recruits were larger) at middle than at high elevations. However, even with this increase, barnacle recruitment on this NW Atlantic coast is still lower than for comparable habitats on the NE Atlantic and NE Pacific coasts, and also lower than previously reported for wave-exposed locations farther south on the NW Atlantic coast, in Maine, USA. Therefore, barnacle recruitment in wave-exposed intertidal environments in Nova Scotia appears to be only moderate relative to other shores. This difference in the supply of barnacle recruits might influence the intensity of interspecific interactions involving barnacles.

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.

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