Brief description
This study assesses the effects of trampling on Hormosira banksii dominated rocky intertidal algal beds within Point Nepean National Park, Victoria, over six summers between 1991 and 1996. This dataset gives the percent cover of understory algae within beds of Hormosira banksii after exposure to four levels of trampling for 3 and 5 years. Sites were located at Cheviot Beach (Harry's pool, Cheviot mid) or Grenade Range, ~ 1 km apart. Percent cover of understory algae was sampled in the Autumn of 1993 and 1995, after 3 and 5 years of trampling, respectively. Trampling reduced the abundance of articulated coralline algae at the Grenade Range site but not at either of the two Cheviot Beach sites.Lineage
Maintenance and Update Frequency: notPlanned
Statement: Percent cover of algae was sampled by counting and identifying algae beneath each point of a 100 point grid created within quadrats (0.70 m x 0.35 m).
Statement: 1.Source:
a. Dataset: The dataset gives the percent cover of various taxa of understory algae, and groupings of these taxa, within two adjoining quadrats (0.70 x 0.35 m) placed in the centre of experimental strips of shoreline (0.5 m x 2-3 m long). Two replicate strips were sampled at each of four levels of Trampling (0, 5 10, 25 passages), within each of two Plots (~ 10 x 3 m), at each of three Sites (Cheviot Mid, Harry's Pool, Grenade Range). Sites were located within the Mornington Peninsular National Park at either Cheviot Beach or Grenade Range, ~ 1 km apart. A trampling passage represents a single walk over a strip. Trampling treatments were applied on 6-8 occasions during low-tide over summer. Percent cover was sampled in Autumn 1993 and 1995, after 3 and 5 years of experimental trampling, respectively.
Sampling Method: Percent cover of understory algae was sampled by counting and identifying understory algae beneath each point of a 100 point grid, within two abutting quadrats (0.70 m x 0.35 m) positioned in the centre of each experimental strip of shoreline (0.50 m x 2-3 m long). Percent cover of understory algae in the dataset represents the average of the two adjoining quadrats (each 0.70 m x 0.35 m) sampled in each strip of shoreline.
Data columns in the data are:
Place (C, Cheviot Beach; G, Grenade Range);Site (CM, Cheviot Mid; HP, Harry's Pool; GR, Grenade Range); Plot (CMSEA, Cheviot Mid sea; CMSHORE, Cheviot Mid shore; GRE, Grenade Range east, GRW, Grenade Range west; HPE, Harry's pool east; HPW, Harry's pool west); Trampling (1, 0 passages; 2, 5 passages, 3, 10 passages, 4, 25 passages);
%ACor93; %ACor95; %EnCor93; %EnCor95 %AllCor93; %AllCor95; %Turf93; %Turf95; %All algae93;%Allalg ae95.
ACor = Articulate Coralline algae; EnCor = Encrusting Coralline algae; AllCor = All Coralline algae; Turf = all uncalcified encrusting algae, including Cladophora and Ralfsia. Coralline algae could not be identified to species level in the field
b. Scale: Percent cover of understory algae in the data set represents the average of the two adjoining quadrats (each 0.70 m x 0.35 m) sampled in each strip of shoreline.
c. Media Types: Not Relevant
d. Date: Autumn 1993, Autumn, 1995
e. Dates of various parts of the process: Sampling was carried out in Autumn 1993 and Autumn 1995, after 3 and 5 years of experimental trampling in summer.
2. Processing Steps
a. Intermediate processing steps (after data capture): Percent cover of understory algae in the data set represents the average of the two adjoining quadrats (each 0.70 m x 0.35 m) sampled in each strip of shoreline
b. Methods used to generate final product: Not Relevant
a. Dataset: The dataset gives the percent cover of various taxa of understory algae, and groupings of these taxa, within two adjoining quadrats (0.70 x 0.35 m) placed in the centre of experimental strips of shoreline (0.5 m x 2-3 m long). Two replicate strips were sampled at each of four levels of Trampling (0, 5 10, 25 passages), within each of two Plots (~ 10 x 3 m), at each of three Sites (Cheviot Mid, Harry's Pool, Grenade Range). Sites were located within the Mornington Peninsular National Park at either Cheviot Beach or Grenade Range, ~ 1 km apart. A trampling passage represents a single walk over a strip. Trampling treatments were applied on 6-8 occasions during low-tide over summer. Percent cover was sampled in Autumn 1993 and 1995, after 3 and 5 years of experimental trampling, respectively.
Sampling Method: Percent cover of understory algae was sampled by counting and identifying understory algae beneath each point of a 100 point grid, within two abutting quadrats (0.70 m x 0.35 m) positioned in the centre of each experimental strip of shoreline (0.50 m x 2-3 m long). Percent cover of understory algae in the dataset represents the average of the two adjoining quadrats (each 0.70 m x 0.35 m) sampled in each strip of shoreline.
Data columns in the data are:
Place (C, Cheviot Beach; G, Grenade Range);Site (CM, Cheviot Mid; HP, Harry's Pool; GR, Grenade Range); Plot (CMSEA, Cheviot Mid sea; CMSHORE, Cheviot Mid shore; GRE, Grenade Range east, GRW, Grenade Range west; HPE, Harry's pool east; HPW, Harry's pool west); Trampling (1, 0 passages; 2, 5 passages, 3, 10 passages, 4, 25 passages);
%ACor93; %ACor95; %EnCor93; %EnCor95 %AllCor93; %AllCor95; %Turf93; %Turf95; %All algae93;%Allalg ae95.
ACor = Articulate Coralline algae; EnCor = Encrusting Coralline algae; AllCor = All Coralline algae; Turf = all uncalcified encrusting algae, including Cladophora and Ralfsia. Coralline algae could not be identified to species level in the field
b. Scale: Percent cover of understory algae in the data set represents the average of the two adjoining quadrats (each 0.70 m x 0.35 m) sampled in each strip of shoreline.
c. Media Types: Not Relevant
d. Date: Autumn 1993, Autumn, 1995
e. Dates of various parts of the process: Sampling was carried out in Autumn 1993 and Autumn 1995, after 3 and 5 years of experimental trampling in summer.
2. Processing Steps
a. Intermediate processing steps (after data capture): Percent cover of understory algae in the data set represents the average of the two adjoining quadrats (each 0.70 m x 0.35 m) sampled in each strip of shoreline
b. Methods used to generate final product: Not Relevant
Notes
CreditThis project was supported the Australian Research Council (ARC).
Credit
Permission to work at Point Nepean was given by the National Parks Service.
Permission to work at Point Nepean 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.
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.
A number of people assisted with data collection including Nick Gust, Michael Holloway, Laura Stuart, Michael Shirley and Jim Radford.
Purpose
To identify the effect of trampling on the abundance of understorey algae in Hormosira banskii dominated rocky intertidal algal beds
To identify the effect of trampling on the abundance of understorey algae in Hormosira banskii dominated rocky intertidal algal beds
Created: 18 01 2007
Data time period: 04 1993 to 04 1995
text: westlimit=144.666; southlimit=-38.314; eastlimit=144.666; northlimit=-38.314
Subjects
54006000 |
54100001 |
55121000 |
56180044 |
Biosphere | Ecological Dynamics | Adaptation |
Biosphere | Vegetation | Macroalgae |
Civil Disturbance |
Cladophoraceae |
Corallinaceae |
EARTH SCIENCE |
ENVIRONMENTAL IMPACTS |
HUMAN DIMENSIONS |
Hormosira banksii |
Mornington Peninsula, Victoria |
Oceans | Marine Biology | Marine Plants |
Point Nepean National Park |
Ralfsiaceae |
articulate coralline algae |
biota |
encrusting coralline algae |
experimental_method |
periodic |
taxonomic_group_coverage |
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Other Information
global : e769f830-0cc3-11dc-ab27-00188b4c0af8
Identifiers
- global : 5b39a7a0-1977-11dc-819b-00188b4c0af8
