Description
Three species of epiphytic dinoflagellates - Ostreopsis siamensis, O. lenticularis, and O. ovata have recently been found on both the east and west coasts of the upper North Island, New Zealand. The morphological differences of all three Ostreopsis spp. have been studied with both light and scanning electron microscopes. Detailed studies of the inner face of the thecal wall of Ostreopsis siamensis revealed two types of trichocyst pores: small, simple pores and large multipore structures. The multipore structures apparently have not been previously reported. Surveys conducted during the period from November 1995 to April 1997 showed that all three Ostreopsis spp. were fairly widespread in northern New Zealand, and all three species were found to occur south of 35°S latitude. Cell concentrations of Ostreopsis spp. in summer were substantially higher than in early spring. There was also a clear regional difference in distribution; cell concentrations of the dominant species, O. siamensis, were greatest in Rarawa and Tokerau on the north-east coast. Other less abundant epiphytic species recorded during the same period included Prorocentrum lima, P. compressum, and Coolia monotis. These species were generally more sporadic in distribution than Ostreopsis spp.
Enregistrements de données
Les données de cette ressource occurrence ont été publiées sous forme d'une Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant qu'ensemble d'un ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 85 enregistrements.
Cet IPT archive les données et sert donc de dépôt de données. Les données et métadonnées de la ressource sont disponibles pour téléchargement dans la section téléchargements. Le tableau des versions liste les autres versions de chaque ressource rendues disponibles de façon publique et permet de tracer les modifications apportées à la ressource au fil du temps.
Versions
Le tableau ci-dessous n'affiche que les versions publiées de la ressource accessibles publiquement.
Comment citer
Les chercheurs doivent citer cette ressource comme suit:
Chang F, Shimizu Y, Hay B, Stewart R, Mackay G, Tasker R, Chang K (2023). Three recorded Ostreopsis spp. (Dinophyceae) in New Zealand: in the upper North Island from 1995 to 1997. Version 1.0. The National Institute of Water and Atmospheric Research (NIWA). Occurrence dataset. https://nzobisipt.niwa.co.nz/resource?r=ostreopsis_nz_2000&v=1.0
Droits
Les chercheurs doivent respecter la déclaration de droits suivante:
L’éditeur et détenteur des droits de cette ressource est The National Institute of Water and Atmospheric Research (NIWA). Ce travail est sous licence Creative Commons Attribution (CC-BY) 4.0.
Enregistrement GBIF
Cette ressource a été enregistrée sur le portail GBIF, et possède l'UUID GBIF suivante : 0fd9aada-c6a7-4b60-b3ec-567b940f88fa. The National Institute of Water and Atmospheric Research (NIWA) publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec l'approbation du GBIF New Zealand.
Mots-clé
Occurrence; Observation
Contacts
- Créateur ●
- Personne De Contact
- Créateur
- Créateur
- Créateur
- Créateur
- Créateur
- Fournisseur Des Métadonnées
Couverture géographique
east and west coasts of the upper North Island, New Zealand
| Enveloppe géographique | Sud Ouest [-35,845, 173,12], Nord Est [-34,716, 174,574] |
|---|
Couverture taxonomique
epiphytic dinoflagellates
| Species | Ostreopsis siamensis, Ostreopsis lenticularis, Ostreopsis ovata, Prorocentrum lima, Coolia monotis |
|---|
Couverture temporelle
| Date de début / Date de fin | 1995-11-01 / 1997-04-03 |
|---|
Méthodes d'échantillonnage
All epiphytic dinoflagellate samples were collected both from seaweeds and surface waters at uninhabited sites. All seaweeds were hand collected from below low water at depths of c. 1 m. There were no coral reefs at these sites. In April 1997 surface seawater samples were collected from Rarawa and Tokerau.
| Etendue de l'étude | The study areas were located at the far north of New Zealand stretching from 34°30'S to 35°40'S latitude, and were made up of close inshore embayments on the east coast and open sandy beach on the west coast of the upper North Island. Nearshore waters on the north-east coast are bounded at the shelf edge by the East Auckland Current, a warm high salinity subtropical current (Sharpies 1997; Chang et al. 1998). Typically in summer, warm surface subtropical waters intrude into nearshore waters (Sharpies 1997). On the north-east coast, several sites in the vicinity of Rangaunu Harbour are important commercial shellfish harvesting areas. During the period from November 1995 to April 1997, seaweed samples were collected from the core areas, Rangiputa, Tokerau, Rarawa on the north-east coast, and one site from Reef Pt on the north-west coast of the upper North Island. In March and September/October 1996 additional samples were collected from Cable Bay, Paihia, Urquhart, Whangarei Wharf, and Ocean Beach on the north-east coast, and Scott Pt and The Bluff on the north-west coast of the North Island. |
|---|
Description des étapes de la méthode:
- A seaweeds and sea water collected were immediately fixed in a final concentration of 5% formaldehyde in a 500 ml plastic jar. Four batches (twice per year) of seaweed samples were collected between November 1995 and April 1997.
- Seaweed samples were processed in the laboratory by shaking vigorously in a jar for a couple of minutes, and rinsing them 3 times with freshly prepared 5% formaldehyde in sea water (c. 200 ml in each rinse). The epiphytic dinoflagellates washed off the seaweeds in all rinses were pooled together, and then sieved through 100 um nylon mesh to remove extraneous matter and left to settle overnight. The supernatant was withdrawn using a suction pump at low pressure the following day and samples reduced to a final volume of 100-200 ml.
Citations bibliographiques
- F. H. Chang , Y. Shimizu , B. Hay , R. Stewart , G. Mackay & R. Tasker (2000) Three recently recorded Ostreopsis spp. (Dinophyceae) in New Zealand: Temporal and regional distribution in the upper North Island from 1995 to 1997, New Zealand Journal of Marine and Freshwater Research, 34:1, 29-39 DOI: 10.1080/00288330.2000.9516913
Métadonnées additionnelles
marine, harvested by iOBIS
| Identifiants alternatifs | https://nzobisipt.niwa.co.nz/resource?r=ostreopsis_nz_2000 |
|---|