Data

Historical effects of periodic trampling on the cover of Hormosira banksii

Australian Ocean Data Network
Keough, M.J., Professor ; Quinn, Gerry, Professor
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/36224820-0ce6-11dc-ab27-00188b4c0af8&rft.title=Historical effects of periodic trampling on the cover of Hormosira banksii&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/36224820-0ce6-11dc-ab27-00188b4c0af8&rft.description=This study examines the effects of experimental trampling on Hormosira banksii dominated rocky intertidal platforms within the Point Nepean National Park, Victoria between 1991 and 1996. This dataset gives the percent cover of the brown algae Hormosira banskii in response to different intensities and histories of experimental trampling. Percent cover of Hormosira banksii was assessed on three occasions: end of summer 1994-1995, pre-summer 1995-1996, end of summer 1995-1996. A comparison of areas of shoreline that had been trampled for two and four summers did not appear to influence the response to a new trampling episode. However, it was recognised that a mild summer experience during the trial may have reduced the potential impact of trampling, weakening the capacity to detect historical effects.Maintenance and Update Frequency: notPlannedStatement: Quadrats 0.70 cm x 0.35 m, slide film, Hi-8 Video, projector.Statement: 1.Source: a. Dataset: The dataset gives the percent cover of Hormosira banskii in response to different intensities and histories of trampling. At the start of the experiment, in the summer of 1990-1991, each of four levels of trampling were applied to two strips of shoreline (0.50 m x 2-3 m long), within each of two plots (~ 10 x 3 m), at two sites (Harry's Pool and Cheviot Mid) located at Cheviot Beach. Trampling levels were 0, 5, 10 and 25 passages per day; a passage represents a single walk over a strip. Trampling treatments were applied on 6-8 occasions during low-tide over summer. To create plots that had different trampling histories, additional plots were established at each of the Cheviot Beach sites in the summer of 1992-1993 and 1994-1995. As a result, prior to trampling treatments being applied in the summer of 1994-1995, each site had two plots that had been trampled for four years, one plot that had been trampled for two years, and one with no prior exposure to trampling. Percent cover was assessed on three occasions: end of summer 1994-1995, pre-summer 1995-1996, end of summer 1995-1996. Sampling Method: The percent cover of Hormosira banskii was sampled within 0.70 x 0.35 m quadrats placed in the centre of each experimental strip. Sampled quadrats were photographed using slide film or Video-8. Hormosira cover was then assessed by superimposing 100 randomly placed dots on a projected image of a quadrat. Data columns in the data set are: Site (CM, Cheviot Mid; HP, Harry's Pool); Plot (CMSEA, Cheviot Mid Sea; CMSHORE, Cheviot Mid Shore; CMNEW, Cheviot Mid New, CMNEW2; Cheviot Mid New2; HPE, Harry's Pool East; HPW, Harry's Pool West; HPN, Harry's Pool New; HPN2, Harry's Pool New2); History (0, no prior trampling; 2, two years of prior trampling; 4, four years of prior trampling); Trampling ( 1, 0 passages; 2, 5 passages, 3, 10 passages, 4, 25 passages); HendS94-95 (percent cover of Hormosira at the end of the summer of 1994-1995);HpreS95-96 (percent Hormosira before the summer of 1995-1996); HendS95-96 (percent cover of Hormosira at the end of the summer of 1995-1996) b. Scale: Percent cover of Hormosira banskii within 0.70 m x 0.30 m quadrats c. Media Types: Not Relevant d. Date: 1990-1996 e. Dates of various parts of the process: Percent cover was assessed on three occasions: i) end of summer 1994-1995; ii) pre-summer 1995-1996 and iii) end of summer 1995-1996. Sampling just before summer reflects the extent of recovery from the trampling applied in the previous season. Sampling at the end of summer reflects the effects of trampling. 2. Processing Steps a. Intermediate processing steps (after data capture): Nil b. Methods used to generate final product: Not Relevant&rft.creator=Keough, M.J., Professor &rft.creator=Quinn, Gerry, Professor &rft.date=2007&rft.coverage=westlimit=144.666; southlimit=-38.314; eastlimit=144.666; northlimit=-38.314&rft.coverage=westlimit=144.666; southlimit=-38.314; eastlimit=144.666; northlimit=-38.314&rft_rights=Creative Commons Attribution 2.5 Australia License http://creativecommons.org/licenses/by/2.5/au/&rft_rights=The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).&rft_rights=Contact M. Keough for access to the data.&rft_subject=biota&rft_subject=CIVIL DISTURBANCE&rft_subject=EARTH SCIENCE&rft_subject=HUMAN DIMENSIONS&rft_subject=ENVIRONMENTAL IMPACTS&rft_subject=Biosphere | Ecological Dynamics | Adaptation&rft_subject=Oceans | Marine Biology | Marine Plants&rft_subject=Biosphere | Vegetation | Macroalgae&rft_subject=Point Nepean National Park&rft_subject=Mornington Peninsula&rft_subject=periodic&rft_subject=54 100001&rft_subject=Hormosira banksii&rft_subject=experimental_method_history&rft_subject=experimental_method&rft_subject=coverage&rft.type=dataset&rft.language=English Access the data
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The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).

Contact M. Keough for access to the data.

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Brief description

This study examines the effects of experimental trampling on Hormosira banksii dominated rocky intertidal platforms within the Point Nepean National Park, Victoria between 1991 and 1996. This dataset gives the percent cover of the brown algae Hormosira banskii in response to different intensities and histories of experimental trampling. Percent cover of Hormosira banksii was assessed on three occasions: end of summer 1994-1995, pre-summer 1995-1996, end of summer 1995-1996. A comparison of areas of shoreline that had been trampled for two and four summers did not appear to influence the response to a new trampling episode. However, it was recognised that a mild summer experience during the trial may have reduced the potential impact of trampling, weakening the capacity to detect historical effects.

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Maintenance and Update Frequency: notPlanned
Statement: Quadrats 0.70 cm x 0.35 m, slide film, Hi-8 Video, projector.
Statement: 1.Source: a. Dataset: The dataset gives the percent cover of Hormosira banskii in response to different intensities and histories of trampling. At the start of the experiment, in the summer of 1990-1991, each of four levels of trampling were applied to two strips of shoreline (0.50 m x 2-3 m long), within each of two plots (~ 10 x 3 m), at two sites (Harry's Pool and Cheviot Mid) located at Cheviot Beach. Trampling levels were 0, 5, 10 and 25 passages per day; a passage represents a single walk over a strip. Trampling treatments were applied on 6-8 occasions during low-tide over summer. To create plots that had different trampling histories, additional plots were established at each of the Cheviot Beach sites in the summer of 1992-1993 and 1994-1995. As a result, prior to trampling treatments being applied in the summer of 1994-1995, each site had two plots that had been trampled for four years, one plot that had been trampled for two years, and one with no prior exposure to trampling. Percent cover was assessed on three occasions: end of summer 1994-1995, pre-summer 1995-1996, end of summer 1995-1996. Sampling Method: The percent cover of Hormosira banskii was sampled within 0.70 x 0.35 m quadrats placed in the centre of each experimental strip. Sampled quadrats were photographed using slide film or Video-8. Hormosira cover was then assessed by superimposing 100 randomly placed dots on a projected image of a quadrat. Data columns in the data set are: Site (CM, Cheviot Mid; HP, Harry's Pool); Plot (CMSEA, Cheviot Mid Sea; CMSHORE, Cheviot Mid Shore; CMNEW, Cheviot Mid New, CMNEW2; Cheviot Mid New2; HPE, Harry's Pool East; HPW, Harry's Pool West; HPN, Harry's Pool New; HPN2, Harry's Pool New2); History (0, no prior trampling; 2, two years of prior trampling; 4, four years of prior trampling); Trampling ( 1, 0 passages; 2, 5 passages, 3, 10 passages, 4, 25 passages); HendS94-95 (percent cover of Hormosira at the end of the summer of 1994-1995);HpreS95-96 (percent Hormosira before the summer of 1995-1996); HendS95-96 (percent cover of Hormosira at the end of the summer of 1995-1996) b. Scale: Percent cover of Hormosira banskii within 0.70 m x 0.30 m quadrats c. Media Types: Not Relevant d. Date: 1990-1996 e. Dates of various parts of the process: Percent cover was assessed on three occasions: i) end of summer 1994-1995; ii) pre-summer 1995-1996 and iii) end of summer 1995-1996. Sampling just before summer reflects the extent of recovery from the trampling applied in the previous season. Sampling at the end of summer reflects the effects of trampling. 2. Processing Steps a. Intermediate processing steps (after data capture): Nil b. Methods used to generate final product: Not Relevant

Notes

Credit
This project was supported by the Australian Research Council (ARC).
Credit
Permission to work at Point Nepean National Park was given by the National Parks Service.
Credit
The Australian Bureau of Meteorology and the National Tidal Facility provided data on air temperature and tides, respectively.
Credit
A number of people assisted with data collection including Nick Gust, Michael Holloway, Laura Stuart, Michael Shirley and Jim Radford.
Purpose
This study was carried out to assess if trampling by humans alters the cover of Hormosira banskii in rocky intertidal shores.

Created: 19 01 2007

Data time period: 12 1990 to 31 01 1996

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144.666,-38.314

144.666,-38.314

text: westlimit=144.666; southlimit=-38.314; eastlimit=144.666; northlimit=-38.314

Subjects
54 100001 | Biosphere | Ecological Dynamics | Adaptation | Biosphere | Vegetation | Macroalgae | Civil Disturbance | EARTH SCIENCE | ENVIRONMENTAL IMPACTS | HUMAN DIMENSIONS | Hormosira banksii | Mornington Peninsula | Oceans | Marine Biology | Marine Plants | Point Nepean National Park | biota | coverage | experimental_method | experimental_method_history | periodic |

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  • global : 36224820-0ce6-11dc-ab27-00188b4c0af8