Please Login or Register

You are here: HomeResources Publications & Reports › Habitat Studies NZ

Documents

Now Browsing: Habitat Studies NZ

This collection of papers looks at the important field of marine work which seeks to describe and map habitats in the marine environment and the methods used to do this work. Habitat mapping is a key tool used to underpin the design of MPA's.

Download

This file has a .pdf extensionMap Book - Marine Habitat Map of Northland: Mangawhai to Ahipara Vers. 1
Author(s): Vince Kerr

Ten A3 maps supporting the technical report

A marine habitat map for the Northland section of the Northeast Marine
Bioregion in New Zealand’s territorial sea has been completed and is
presented in a series of maps. The maps cover an area of 1.34 million
hectares extending out 12 nautical miles from the coast between Ahipara
in the west to Mangawhai on the east coast.

Data were collated from a range of recent and historic sources,
and merged and analysed in ArcGIS 9.3.1 Geographical Information
System. These data include multibeam and sidescan sonar data from
the National Institute for Water and Atmospheric Research and Land
Information New Zealand. A ‘rapid sonar survey’ technique was developed
to fill data gaps for areas not covered by past or recent survey effort.
These sources and methods are described to assist in understanding
the strengths and weaknesses of the current habitat maps and to help
implement improvements in this and future work.

The use of the habitat maps to identify potential locations for a network
of marine protected areas in Northland is discussed and recommendations
are made to incorporate this information within decision support tools
to assist in planning, education and community engagement.

Added to archive on 06/06/2010 and placed in the following categories: Habitat Studies NZ | Regional Biodiversity Info Reports | MPA's and Networks NZ | MPA Case Studies | MPA Network and Marine Reserve Design | MPA Process and Policy | MPA Proposals and Applications | Marine Reserve Research and Monitoring NZ |

Download

This file has a .pdf extensionMarine Habitat Map of Northland: Mangawhai to Ahipara Vers. 1
Author(s): Vince Kerr

A marine habitat map for the Northland section of the Northeast Marine
Bioregion in New Zealand’s territorial sea has been completed and is
presented in a series of maps. The maps cover an area of 1.34 million
hectares extending out 12 nautical miles from the coast between Ahipara
in the west to Mangawhai on the east coast.

Data were collated from a range of recent and historic sources,
and merged and analysed in ArcGIS 9.3.1 Geographical Information
System. These data include multibeam and sidescan sonar data from
the National Institute for Water and Atmospheric Research and Land
Information New Zealand. A ‘rapid sonar survey’ technique was developed
to fill data gaps for areas not covered by past or recent survey effort.
These sources and methods are described to assist in understanding
the strengths and weaknesses of the current habitat maps and to help
implement improvements in this and future work.

The use of the habitat maps to identify potential locations for a network
of marine protected areas in Northland is discussed and recommendations
are made to incorporate this information within decision support tools
to assist in planning, education and community engagement.

Added to archive on 06/06/2010 and placed in the following categories: Marine Biodiversity NZ | Habitat Studies NZ | MPA's and Networks NZ | MPA Case Studies | MPA Network and Marine Reserve Design | MPA Process and Policy | MPA Proposals and Applications | Marine Reserve Research and Monitoring NZ |

Download

This file has a .pdf extensionSnapper - what have we learned from marine reserves
Author(s): D Egli and R Babcock

The influence of fishing has already permanently altered large portions of marine ecosystems worldwide, yet if left undisturbed by human activity, rich biological communities develop in marine reserves. Exploitation of the sea has become so pervasive that we now talk about “marine reserve effects” when in fact what we are really seeing is how nature could be, in the absence of human transformation.
Marine reserves provide opportunities for recreation and study. All marine life is protected from fishing and other forms of exploitation, enabling fish, shellfish, seaweed and other marine species to flourish and allowing degraded areas to recover.

Added to archive on 06/05/2010 and placed in the following categories: Education High School | Biology | Marine Biodiversity NZ | Habitat Studies NZ | MPA's and Networks NZ | MPA Case Studies | Marine Reserve Research and Monitoring NZ |

Download

This file has a .pdf extensionHydrographic Surveying in Marine Protected Areas [truncated title]
Author(s): Emily Todd

[Full title: Hydrographic Surveying in Marine Protected Areas: Investigations and Recommendations for Guidelines for Creation and Monitoring]
Hydrographic surveying methods are able to assist the creation and monitoring of a network of marine reserves by providing quantifiably accurate datasets that can be utilized by a variety of end users. This dissertation investigates the requirements for creating and monitoring MPAs, considering both past practises and probable future developments. It demonstrates that hydrographic surveying methods have a vital role to play in the production of data for MPA planning and management. The final chapters of this dissertation develop recommendations for guidelines for hydrographic surveying work in MPAs.

Added to archive on 07/04/2007 and placed in the following categories: Habitat Studies NZ |

Download

This file has a .pdf extensionValidation of Qualitative Habitat Descriptors for Subtidal Reef Assemblages [truncated title]
Author(s): Nick Shears

The authors undertake a survey of shallow subtidal reefs in north-eastern New Zealand, identifying a number of commonly occurring “habitat types”. In this paper the abundances of habitat-forming species within each of these habitats are quantified and the validity of the subjective classification system is tested. In addition to previously-described reef habitats from north-eastern New Zealand a number of other habitat types were encountered and described. The paper concludes that there is strong evidence that the habitat classifications used in this study are biologically meaningful based on the abundances of habitatforming algal groups. Furthermore, the authors submit this demonstrates that these habitat types can be reliably categorised visually, which has important applications in classification and mapping of the marine environment.

Added to archive on 06/22/2007 and placed in the following categories: Habitat Studies NZ |

Download

This file has a .pdf extensionMapping of the Subtidal Habitats of the Cape Rodney to Okakari Point Marine Reserve New Zealand
Author(s): Brice Remy-Zephir

This report produces a map that is the first to cover the whole Cape Rodney to Okakari Point Marine Reserve (approximately 500 ha.) and adjacent areas since the initial survey by Ayling (1975-1979). Survey methods included side scan sonar, drop-down video, aerial photographs, scuba and snorkelling. The author submits that the analysis and comparison of this new habitat map with the one done by Ayling, shows great variations after 30 years of protection: an increase of the Ecklonia forest higher than 30% and a decrease close to the same percentage for the urchin barrens within the reserve. Habitats outside the reserve don’t show any significant difference. These results support the habitat surveys done at smaller scales aswell as those on populations of snapper, crayfish, kina and Ecklonia done since the creation of the reserve, and are related to what is called “top-down regulation” or “trophic cascade”.

Added to archive on 06/22/2007 and placed in the following categories: Habitat Studies NZ |

Download

This file has a .pdf extensionIntertidal and Subtidal Habitats of Mimiwhangata Marine Park and Adjacent Shelf
Author(s): Roger Grace

This report records extensions and updates of the habitat maps of the marine area at Mimiwhangata Marine Park and Paparahi Point, northen New Zealand, completed in 1973 and 1981. Areas of seafloor were surveyed using a combination of remote operated vehicle drop video, and side-scan and single-beam sonar techniques. Aerial photographs were used to map shallow habitats and to assess historical changes in the distribution and extent of algal forest. A map of physical and biological habitats was produced covering an area of approximately 8700 ha. A significant finding was that extensive long-term habitat change has occurred in the shallow rock reef habitats at Mimiwhangata. The past history of scientific study at Mimiwhangata coupled with the variety of habitats and diversity of marine life present suggest that Mimiwhangata is an ideal candidate site for greater marine protection and further scientific inquiry.

Added to archive on 06/22/2007 and placed in the following categories: Habitat Studies NZ |

Download

This file has a .pdf extensionIntertidal and Subtidal Habitats of Doubtless Bay, Northland, New Zealand
Author(s): Roger Grace

This report is the product from a habitat investigation of the Doubtless Bay area completed in April - June 2005. The authors conclude that the marine habitats of Doubtless Bay are typical of those generally on the Northland east coast, but the large area of low reef in the central part of the Bay is a special feature which may have value as a nursery area for fish. The extensive occurrence of kina barrens suggests that snapper and crayfish have been seriously depleted. The authors recommended that the report and maps should be used widely to promote awareness within the community of the marine values of Doubtless Bay, and to foster moves toward improved management including establishment of marine protected areas and marine reserves as the central core of any restoration programme. Monitoring at a few key sites could involve the local community. The complexity and diversity of habitats represented in Doubtless Bay suggest that the area is an ideal candidate site for some form of marine protection.

Added to archive on 06/21/2007 and placed in the following categories: Habitat Studies NZ |

Download

This file has a .pdf extensionDoubtless Bay Habitat Maps
Author(s): Roger Grace

A selection of aerial photographs, habitat maps and bathymetry maps of Doubtless Bay, Northland.

Added to archive on 06/21/2007 and placed in the following categories: Habitat Studies NZ |

Page 3 of 3 pages  <  1 2 3

MarineNZ.org Sponsors

Sponsors

Document Categories