Show Map
  • Added 19 Apr 2017
  • 1924 Views
  • 193 Downloads

THIS DATASET IS A DRAFT VERSION
This datasets contains the underlying bathymetry used to delineate the draft estuarine boundaries

The research has been undertaken to provide a stronger foundation for ensuring that examples of all types of historically rare ecosystems are legally secure for conservation under either Crown or private tenure, and to ensure that management actions are appropriate to guarantee the retention of these unique environments and the biota they contain.

In New Zealand, the heterogeneity of the landscape has resulted in a diverse array of small, often widely dispersed, rare ecosystems that tend to occur in extreme, typically treeless, environments. As such they have been rare since before humans arrived, which is the rationale for the term 'historically' rare. Such ecosystems may contribute to biodiversity by having very high fine-scale native species richness (e.g. ephemeral wetlands, coastal turfs), high endemism (e.g. ultramafic areas, karst specialised lifeforms (e.g. halophytes in salt pans, tropical taxa in geothermal areas)).Further, such ecosystems now may provide important refuges for native plant and animal species within highly modified landscapes.

Estuaries are where fresh water from rivers mixes with salt water. They are formed where the underlying or adjacent topography constrains the mixed water throughout the tidal cycle. They are formed behind barriers such as sand spits and coastal embayments, at river mouths, in drowned river valleys with gently sloping substrates, and even in fjords. Their inland limit is where salinity reaches a dilution of 5% of the marine concentration (Clarkson et al. 2003). Sheltered, northern estuaries can support mangroves (Avicennia marina).

Estuaries are widespread in New Zealand (more so than lagoons) and occur in about 40 ecological regions from Northland to Fiordland.

Maintaining threatened rare ecosystems is an eight-year research programme (from July 2005), funded by the Foundation for Research, Science and Technology (FRST).

*LICENCE***

This work is licensed under the Creative Commons Attribution 3.0 New Zealand License. To view a copy of this license, visit creativecommons.org/licenses/by/3.0/nz/ or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.

*DISCLAIMER***

  1. DOC makes no express or implied warranties as to the accuracy or completeness of the data or information, nor its suitability for any purpose. Errors are inevitably part of any database, and can arise by a number of means, from errors during field data collection, to errors during data entry.
  2. DOC makes no warranties or representations as to possible infringement upon copyrights or other intellectual property rights of others in the data or information.
  3. DOC will not accept liability for any direct, indirect, special or consequential damages, losses or expenses howsoever arising and relating to use, or lack of use, of the data or information supplied.

*GUIDELINES FOR THE USE OF THE INFORMATION***

  1. Care should be taken in deriving conclusions from any data or information supplied.
  2. Any use of the data or information supplied should state when the data or information was acquired and that it may now be out-of-date.

*COPYRIGHT OBLIGATIONS***

  1. All proprietary rights to the intellectual property in the data or information remain with the Crown as its sole property.
  2. Modification of the data and information or the addition of the information does not confer copyright or any other form of property of the original material to a user.
  3. All maps or reports that are derived from the data or information must acknowledge the Crown copyright, in the following way: Crown Copyright: Department of Conservation Te Papa Atawhai [year].
  4. This information resource may be passed onto another party, in either hard copy or electronic form. If a user does this, then it is recommended that they also supply this metadata record with the information resource.

License

Creative Commons Attribution 3.0 New Zealand

You may use this work for commercial purposes.

You must attribute the creator in your own works.

Information

TagsEstuarine, Rare Ecosystems, Wetlands
RegionsNew Zealand
MetadataDublin Core, ISO 19115/19139

Technical Details

Layer ID 31517
Data type Vector polygon
Feature count 64158
Attributes Bath_Chart, SegFlow_5m, Bath_Source, Estuarine_2m_depth_ID, EST_TYPES, Ed_Comment, Estuarine_4m_depth_ID, Bath_DRVAL1, Bath_DRVAL2, Solution_2m, Estuarine_3m_depth_ID, Solution_4m, Estuarine_1m_depth_ID, Hectares, SegFlow_3m, SegFlow_1m, Estuarine_5m_depth_ID, SegFlow_4m, EST_Source, CreatedDate, ModifiedBy, EST_NAME, Solution_5m, Solution_3m, ModifiedDate, CreatedBy, SegFlow_2m
Services Vector Query API

History

Added19 Apr 2017
Last updated19 Apr 2017
Revisions 1 - Browse all revisions
Current revision Imported on April 18, 2017 from Esri JSON in NZGD2000 / New Zealand Transverse Mercator 2000. 3 geometries modified to be OGC compliant. Changelog.
Show Map