Descripción
This dataset is from a paper about an unusual occurrence of the sea grass, Zostera capricorni, living in an intertidal pool on the storm-swept west coast of Northland is described. The macrofauna associated with the Zostera is similar to that found associated with it elsewhere in its more normal sheltered subtidal and intertidal sandy mud Hat habitat. The pool has a sandy bottom with rocks scattered throughout. The rocks support a rich macrofauna and flora both over their sides and beneath them and this is briefly described.
Living foraminiferal microfauna were found in the sandy sediments that cover the pool bottom, as well as on Corallina turf, but were not found on the laminae of Zostera or on the brown alga Hormosira banksii. The dominant foraminifera on Corallina turf are Rosalina bradyi and Ammonia beccarii with a number of less numerous species. The bottom sands are dominated by live Florilus parri (27-42%), Ammonia beccarii (7-28%) and Evolvocassidulina orientalis, Quinqueloculina seminulum, Rosalina bradyi, Cassidulina carinata, Elphidium charlottensis and Discorbinella bertheloti (all 3-10%). At suborder level the fauna consists of about 90% Rotalina, 9% Miliolina and less than 1% Textulariina. Counts of stained (live) foraminifera indicate standing crop abundance values of 10,000-16,500 living foraminifera per square metre of pool bottom. The faunas contain an unusually high number of planktonics (13-17% of total) for an intertidal situation, but this is thought to be due to the prevalence of onshore winds that drive oceanic water in close to the west coast of New Zealand.
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 103 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:
Hayward B, Hayward B W (2023). An intertidal Zostera pool community at Kawerua, Northland, New Zealand and its foraminiferal microfauna. Version 1.1. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Occurrence dataset. https://nzobisipt.niwa.co.nz/resource?r=zostrea_pool_nz&v=1.1
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 no ha sido registrado en GBIF
Palabras clave
Occurrence; Observation
Contactos
- Originador ●
- Punto De Contacto
- Proveedor De Los Metadatos
- Usuario
Cobertura geográfica
Kawerua, Northland, New Zealand
| Coordenadas límite | Latitud Mínima Longitud Mínima [-35,635, 173,439], Latitud Máxima Longitud Máxima [-35,635, 173,439] |
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Cobertura temporal
| Fecha Inicial / Fecha Final | 1979-01-01 / 1979-01-15 |
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Datos del proyecto
The Auckland University Field Club Scientific Station is situated at Kawerua on the exposed west coast of Northland, 14km south of the mouth of the Hokianga Harbour. Directly in front of the station, the coast consists of a number of basaltic reefs that extend out into the sea for up to 100m. They enclose lagoons and numerous large and small intertidal pools, providing a diversity of habitat types and wealth of marine life available for study. This article describes the macroflora and fauna, and foraminiferal microfauna of only one of the many types of intertidal pool present.
| Título | Rock pool community near Auckland University research station |
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| Descripción del área de estudio | The pool studied is situated 50m north of the track which leads down to the beach from the Kawerua Station. It is at approximately mid-tidal level and has no connection with the sea for about 6 hours during every low tide. The pool is protected from the fierce Tasman Sea waves by a solid reef across its western side. It is enclosed by low piles of boulders covering flat rock shelves to the north and south, and by a quartz sand beach on the eastern, shoreward side. The pool itself is approximately 30 x 15m in size and has a water depth of 5-25cm when not submerged. The pool contains numerous rocks (10-30cm diameter) scattered throughout. Much of its floor is covered by a 1-15cm thick layer of shelly, quartz sand, but in places where there is an abundance of rocks, the sediment is fine gravel. Small clumps (up to 30cm diameter) of the sea grass, Zostera capricorni, occur sporadically in parts of the pool and around their roots the sediment is dark muddy sand. |
Métodos de muestreo
Early in January 1979, six samples were collected from the intertidal Zostera pool and preserved in 10% ethanol. The samples consisted of three of plant material — Zostera laminae, Hormosira banksii and Corallina turf, and three of sediment taken from the upper 2 cm.
| Área de Estudio | Kawerau rock pool, Northland, New Zealand |
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Descripción de la metodología paso a paso:
- On return to the laboratory, the samples were thoroughly washed over a 200-mesh sieve (nominal opening 0.075mm) and left to stand for one hour in a solution of Rose Bengal (a stain for protoplasm, commonly used to identify individuals living at the time of collection). The samples were then washed thoroughly and dried. Despite thorough examination, no foraminifera were found in samples 5 and 6 (on Hormosira or Zostera) and these were discarded.
- Samples 1-3 were divided up using a microsplitter until sufficient material was left containing approximately 300 benthic foraminifera. All foraminifera (including planktonics) in these microsplits were picked, mounted, identified and counted and a note made of the number of stained (live) foraminifera. These counts give an estimate of the relative abundance of the different species and the percentage of live foraminifera in the total sample.
- In addition, a measured volume (50cc for samples 2 and 3, 100cc for sample 4) of each sediment sample was taken and the foraminiferal tests concentrated by floating off in carbon tetrachloride. The entire float material was then examined under water and the stained foraminiferal tests picked out using a glass capillary tube. They were then mounted, identified and counted. These picks give an estimate of the density of live foraminifera in a given volume of sediment (standing crop) and also the relative abundance of the different species living at the time.
- Finally, a further search was made through all four samples and additional species not found in the previous counts were noted as present.
Referencias bibliográficas
- Hayward, B. W. (1979). An intertidal Zostera pool community at Kawerua, Northland and its foraminiferal microfauna. Tane, 25, 173-186.
Metadatos adicionales
marine, harvested by iOBIS
| Identificadores alternativos | https://nzobisipt.niwa.co.nz/resource?r=zostrea_pool_nz |
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