Descripción
The surface areas of 12 subtidal seagrass Zostera muelleri beds at the islands and adjacent mainland shores of the eastern Bay of Islands (35° 12′ S, 174° 10′ E), New Zealand were estimated from aerial images. It appears that little subtidal seagrass existed until after the early-1950s, so significant beds here may be a relatively recent biome. Possible explanations for recent emergence of subtidal seagrass include that debilitating periods of turbid water and pulses of sedimentation associated with the land clearances of the late 1800s had worked through the marine ecosystem. An overall peak in seagrass-cover in the 1960s to 1980s was followed by declines in several beds in the 1990s to 2000s, with recovery since. The temporal presence of seagrass was well-correlated among the three mainland beds, and moderately well among the south-facing beds on the islands, consistent with mechanisms driving seagrass establishment and persistence operating at reasonably broad scales.
Registros
Los datos en este recurso de registros biológicos han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 243 registros.
Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.
Versiones
La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.
¿Cómo referenciar?
Los usuarios deben citar este trabajo de la siguiente manera:
Booth J (2024). Recent (post-1930) changes in the extent of subtidal seagrass (Zostera muelleri) beds of the eastern Bay of Islands, New Zealand. Version 1.4. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Occurrence dataset. https://nzobisipt.niwa.co.nz/resource?r=zostrea_boi_nz&v=1.4
Derechos
Los usuarios deben respetar los siguientes derechos de uso:
El publicador y propietario de los derechos de este trabajo es Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento (CC-BY 4.0).
Registro GBIF
Este recurso ha sido registrado en GBIF con el siguiente UUID: a8786b61-49b6-4d45-afc1-4d50bc434e50. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node publica este recurso y está registrado en GBIF como un publicador de datos avalado por Ocean Biodiversity Information System.
Palabras clave
Occurrence; Observation
Contactos
- Proveedor De Los Metadatos ●
- Originador ●
- Punto De Contacto
- Usuario
Cobertura geográfica
Bay of Islands, New Zealand
| Coordenadas límite | Latitud Mínima Longitud Mínima [-35,236, 174,161], Latitud Máxima Longitud Máxima [-35,212, 174,262] |
|---|
Cobertura taxonómica
Seagrass
| Especie | Zostrea muelleri (Seagrass) |
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Cobertura temporal
| Fecha Inicial / Fecha Final | 1935-01-01 / 2017-12-31 |
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Métodos de muestreo
Interpretation from aerial photography
| Área de Estudio | Bay of Islands, New Zealand |
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Descripción de la metodología paso a paso:
- Aerial images useful in defining the extent of the main subtidal seagrass beds over time were scanned/downloaded, with particular focus on early (pre-satellite) ones. The aim was to acquire a time-series, with at least one image every decade through to the present, that could be used to identify any large-scale (on the order of ≥20%) changes in the seagrass footprint. High-resolution imagery spanning multiple beds was particularly useful because such depictions typically included well-established beds that provided reference for smaller and less well-known ones. Images taken at intervals shorter than a decade – even those separated by a year – were also useful because they could potentially indicate how much the surface manifestation of the seagrass beds changed over short timeframes. (Although plant-condition is important in the dynamics of seagrass, this is not readily assessed from aerial imagery. As it turned out, almost all images were from spring and summer, when this seagrass is typically most lush.
Referencias bibliográficas
- Booth, J.D., 2019. Recent (post-1930) changes in the extent of subtidal seagrass (Zostera muelleri) beds of the eastern Bay of Islands, New Zealand. New Zealand Journal of Marine and Freshwater Research, 53(1), pp.113-127. https://doi.org/10.1080/00288330.2018.1513409
Metadatos adicionales
marine, harvested by iOBIS
| Identificadores alternativos | a8786b61-49b6-4d45-afc1-4d50bc434e50 |
|---|---|
| https://nzobisipt.niwa.co.nz/resource?r=zostrea_boi_nz |