Brief description
This study assesses the effects of trampling on Hormosira banksii dominated rocky intertidal algal beds within Point Nepean National Park over six summers between 1991 and 1996. This dataset gives the number of mobile animals (N per m2) within beds of Hormosira banksii after exposure to four levels of experimental trampling for 3 and 5 years. Sites were located at Cheviot Beach (Harry's pool, Cheviot Mid) or at Grenade Range, ~ 1 km apart. The number of mobile animals were sampled in the Autumn of 1993 and 1995, after 3 and 5 years of summer trampling, respectively. Trampling increased the abundance of a number of herbivorous molluscs, particularly limpet abundance. The effect of trampling on the abundance of mollusks may be indirect as changes in the abundance of mollusks occurred only after changes in the cover of Hormosira.Lineage
Maintenance and Update Frequency: notPlanned
Statement: quadrats 0.70 m x 0.35 m
Statement: 1.Source:
a. Dataset: This dataset gives the number of mobile animal (N per m2) within beds of Hormosira banksii after exposure to four levels of trampling for 3 and 5 years. 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. Each of the four levels of Trampling were applied to two strips (0.5 m x 2-3 m) within each of two plots (10 m x 3 m), at each of three sites (Harry's Pool, Cheviot Mid, Grenade Range). Sites were located at either Cheviot Beach or Grenade Range within Mornington Peninsula National Park, ~ 1 km apart. Trampling treatments were applied over the summer period, between the summers of 1990-1991 and the summer of 1994-1995. The numbers of mobile animals were sampled in Autumn 1993 and 1995, after 3 and 5 years of trampling over summer, respectively.
Sampling Method: Counts of mobile animals were made after thorough searches within each of two abutting quadrats (0.7 m x 0.35 m) positioned in the centre of each strip. Two quadrats were sampled to ensure rarer taxa were captured in the census. The number of animals in each of the two adjoining quadrats were averaged and scaled up to number per m2.
Data columns in the data set are: Site (CB, Cheviot Beach; HP, Harry's Pool; CM, Chevio Mid); Plot (1, 2); Trampling (0, 5, 10, 25); C.tram93; C.tram95; P.alt93; P.alt95; S.die93; S.die95; S.zel93; S.zel95; B.nan 93; B.nan 95; NonL-graz93; NonL-graz95; Limpets93; Limpets95.
C.tram = Cellana tramoserica; P.alt = Patelloida alticostata; S.die=Siphonaria diemenensis; S.zel=Siphonaria zelandicar; B.nan= Bembicium nanum; NonL-graz=Nonlimpet grazers;
b. Scale: To ensure rarer taxa were captured the number of animals within two abutting quadrats (0.70 x 0.35 m) positioned in the centre of each experimental strip of shoreline (0.50 m x 2-3 m long) were counted. Counts from the two adjoining quadrats were averaged and scaled up to number per m2.
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 over summer, respectively.
2. Processing Steps
a. Intermediate processing steps (after data capture): The numbers of animals were pooled to create two herbivore groups: Limpet grazers (Cellana spp. + Patelloida alticostata + Patelloida latistrigata) and Non limpet grazers (Siphonaria spp. + Bembicium spp. + Austrocochlea consrticita+ Turbo undulata)
b. Methods used to generate final product: Counts from the two adjoining quadrats were averaged and scaled up to numbers per m2.
Notes
CreditThis 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.
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.
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 mobile animals in Hormosira banskii dominated rocky intertidal algal beds.
To identify the effect of trampling on the abundance of mobile animals 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
24 002002 |
24 010020 |
24 045004 |
24 046007 |
24 095010 |
24 488002 |
54 100001 |
ANIMALS/INVERTEBRATES |
AQUATIC ECOSYSTEMS |
Austrocochlea constricta |
Benthic Habitat |
BIOLOGICAL CLASSIFICATION |
BIOSPHERE |
Bembicium nanum |
Biosphere | Ecological Dynamics | Adaptation |
Biosphere | Vegetation | Macroalgae |
Civil Disturbance |
EARTH SCIENCE |
ENVIRONMENTAL IMPACTS |
HUMAN DIMENSIONS |
Hormosira banksii |
Mollusks |
Mornington Peninsula, Victoria |
Oceans | Marine Biology | Marine Invertebrates |
Oceans | Marine Biology | Marine Plants |
Patelloida alticostata |
Patelloida latistrigata |
Point Nepean National Park |
Siphonaria zelandica |
Turbo undulata |
biota |
coverage |
experimental_method |
periodic |
taxonomic_group_count |
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Other Information
global : e769f830-0cc3-11dc-ab27-00188b4c0af8
Identifiers
- global : 4edfd2d0-197d-11dc-819b-00188b4c0af8
