Natural variability in zygote dispersal of Ascophyllum nodosum at small spatial scales
1 ???Dispersal of propagules of marine benthic species may contribute to variation in the structure and dynamics of populations. Ascophyllum nodosum dominates the mid???intertidal zone of sheltered rocky shores in the north???west Atlantic, and populations often consist of large, mature individuals...
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Functional Ecology
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ftcalifstateuniv:oai:dspace.calstate.edu:10211.3/201838 2023-05-15T17:40:23+02:00 Natural variability in zygote dispersal of Ascophyllum nodosum at small spatial scales Dudgeon, Steven R. Kubler, Janet E. Petraitis, Peter Steven Vadas, R.L. Wright, W.A. 2001 http://hdl.handle.net/10211.3/201838 en eng Functional Ecology doi.org/10.1046/j.0269-8463.2001.00559.x Functional Ecology 15(5), 595-604. (2001) 0269-8463 http://hdl.handle.net/10211.3/201838 copyright 2001 British Ecological Society Algae intertidal zone marine benthic ecology Article 2001 ftcalifstateuniv https://doi.org/10.1046/j.0269-8463.2001.00559.x 2022-04-13T11:39:59Z 1 ???Dispersal of propagules of marine benthic species may contribute to variation in the structure and dynamics of populations. Ascophyllum nodosum dominates the mid???intertidal zone of sheltered rocky shores in the north???west Atlantic, and populations often consist of large, mature individuals and few newly recruited thalli. 2 ???We investigated the dispersal of zygotes of A. nodosum at three sites on Swans Island, ME, USA, to determine its variability under natural conditions and to test whether limited dispersal explains recruitment patterns. 3 ???At each site we released artificially fertilized, marked zygotes from a single point during the rising tide, and sampled their dispersal using two methods: sampling the water column to track the dispersing cloud of zygotes; and assaying caged ceramic tiles affixed to the shore for the presence of marked zygotes. 4 ???At all sites, zygotes were diluted to ???1??3% of the initial concentration within 8???12 min of their release. The mean direction of transport was correlated with both wind and tidal current direction at only one site. The most dense settlement occurred at this site, suggesting greater local reproductive success. 5 ???Regression analyses based on settlement densities suggest that a quadratic model fit the data best for all sites. Quadratic terms occurred in the direction normal to flow, and are interpreted to represent turbulent transport and diffusion. Both linear and quadratic terms were significant parallel to flow, and we ascribe these to advective transport without and with turbulent mixing, respectively. 6 ???The range of zygote dispersal exceeded 6 m from the source, and therefore cannot explain the exponential decline of recruits in large patches (???10 m diameter) within adult stands of A. nodosum. 7 Migration of zygotes between populations is unlikely, but their local dispersal may strongly influence the spatial and temporal dynamics within populations. Article in Journal/Newspaper North West Atlantic California State University (CSU): DSpace Functional Ecology 15 5 595 604 |
institution |
Open Polar |
collection |
California State University (CSU): DSpace |
op_collection_id |
ftcalifstateuniv |
language |
English |
topic |
Algae intertidal zone marine benthic ecology |
spellingShingle |
Algae intertidal zone marine benthic ecology Dudgeon, Steven R. Kubler, Janet E. Petraitis, Peter Steven Vadas, R.L. Wright, W.A. Natural variability in zygote dispersal of Ascophyllum nodosum at small spatial scales |
topic_facet |
Algae intertidal zone marine benthic ecology |
description |
1 ???Dispersal of propagules of marine benthic species may contribute to variation in the structure and dynamics of populations. Ascophyllum nodosum dominates the mid???intertidal zone of sheltered rocky shores in the north???west Atlantic, and populations often consist of large, mature individuals and few newly recruited thalli. 2 ???We investigated the dispersal of zygotes of A. nodosum at three sites on Swans Island, ME, USA, to determine its variability under natural conditions and to test whether limited dispersal explains recruitment patterns. 3 ???At each site we released artificially fertilized, marked zygotes from a single point during the rising tide, and sampled their dispersal using two methods: sampling the water column to track the dispersing cloud of zygotes; and assaying caged ceramic tiles affixed to the shore for the presence of marked zygotes. 4 ???At all sites, zygotes were diluted to ???1??3% of the initial concentration within 8???12 min of their release. The mean direction of transport was correlated with both wind and tidal current direction at only one site. The most dense settlement occurred at this site, suggesting greater local reproductive success. 5 ???Regression analyses based on settlement densities suggest that a quadratic model fit the data best for all sites. Quadratic terms occurred in the direction normal to flow, and are interpreted to represent turbulent transport and diffusion. Both linear and quadratic terms were significant parallel to flow, and we ascribe these to advective transport without and with turbulent mixing, respectively. 6 ???The range of zygote dispersal exceeded 6 m from the source, and therefore cannot explain the exponential decline of recruits in large patches (???10 m diameter) within adult stands of A. nodosum. 7 Migration of zygotes between populations is unlikely, but their local dispersal may strongly influence the spatial and temporal dynamics within populations. |
format |
Article in Journal/Newspaper |
author |
Dudgeon, Steven R. Kubler, Janet E. Petraitis, Peter Steven Vadas, R.L. Wright, W.A. |
author_facet |
Dudgeon, Steven R. Kubler, Janet E. Petraitis, Peter Steven Vadas, R.L. Wright, W.A. |
author_sort |
Dudgeon, Steven R. |
title |
Natural variability in zygote dispersal of Ascophyllum nodosum at small spatial scales |
title_short |
Natural variability in zygote dispersal of Ascophyllum nodosum at small spatial scales |
title_full |
Natural variability in zygote dispersal of Ascophyllum nodosum at small spatial scales |
title_fullStr |
Natural variability in zygote dispersal of Ascophyllum nodosum at small spatial scales |
title_full_unstemmed |
Natural variability in zygote dispersal of Ascophyllum nodosum at small spatial scales |
title_sort |
natural variability in zygote dispersal of ascophyllum nodosum at small spatial scales |
publisher |
Functional Ecology |
publishDate |
2001 |
url |
http://hdl.handle.net/10211.3/201838 |
genre |
North West Atlantic |
genre_facet |
North West Atlantic |
op_relation |
doi.org/10.1046/j.0269-8463.2001.00559.x Functional Ecology 15(5), 595-604. (2001) 0269-8463 http://hdl.handle.net/10211.3/201838 |
op_rights |
copyright 2001 British Ecological Society |
op_doi |
https://doi.org/10.1046/j.0269-8463.2001.00559.x |
container_title |
Functional Ecology |
container_volume |
15 |
container_issue |
5 |
container_start_page |
595 |
op_container_end_page |
604 |
_version_ |
1766141299442843648 |