Description
Data Records
The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 5,028 records.
2 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versions
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Stichting ANEMOON. ANEMOON Beach washup monitoring (SMP) data along the Dutch coastline collected through citizen science. Version 1.0. stichting ANEMOON. Samplingevent dataset. https://ipt.nlbif.nl/resource?r=anemoon_smp_1977_2024&v=1.0
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is stichting ANEMOON. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC 4.0) License.
GBIF Registration
This resource has not been registered with GBIF
Keywords
Occurrence; Citizen science
Contacts
- Point Of Contact
- Chair
- Metadata Provider ●
- Point Of Contact
Geographic Coverage
Locations scattered across the Dutch coastline.
| Bounding Coordinates | South West [49.382, 2.461], North East [54.368, 7.207] |
|---|
Project Data
No Description available
| Title | SMP (Strandaanspoelsel Monitoring Project) |
|---|
The personnel involved in the project:
Sampling Methods
On transect locations, all washed-up marine organisms and remains are determined and counted on a biweekly or monthly basis. The SMP-trajects vary in length from about one to fout kilometer. Observers make sure they are at the starting point of the SMP traject 30-60 minutes before low tide. Then the first half of the monitoring walk takes place along the low-tide line. At the turning point of the traject the observers turn around and walk back following the high tide line. During the monitoring walk observations are being noted, special findings are photographed and sometimes material is brought home for species determination. Macroalgae, Cnidarians, Gastropods, Cephalopods, Bivalves, Crustaceans, Echinoderms, Shark and Ray egg capsules and Bryozoans are noted at species level. For each species the abundance class (0, 0-10, 11-100, 101-1000, 1001-10000, 10001 – 100000, >100000) and “decay category” are noted (Alive, Doublet, Single valve, Empty snail shell, Flesh remains, Dead (whole specimen), Peel/skeleton, Fragment, without flesh, Exuvia, Subfossil, Fossil, Egg capsule, Egg).
| Study Extent | For now there are nine transects along the Dutch coastline. This number is increased when new transects are born. |
|---|---|
| Quality Control | New observers always accompany experienced observers for some time before going through the monitoring process on their own. The fact that observers walk in pairs at a minimum makes consultation and discussion possible. When in doubt about an identification, the collected material is examined by other experienced citizen scientists or, or if necessary by ANEMOON affiliated experts. The species that are standardly found in the SMP are regularly seen and are often not difficult to identify. When in doubt about the species identity, observers are instructed to note down XX on the SMP fieldwork form or in the SMP-webapp. The XX observations are included in the analysis as ”Missing Values”. |
Method step description:
- Walk fixed SMP trajectory, start 30-60 minutes before low tide, walk along low tide line.
- Turn at fixed turning point
- Walk back along high tide line
- Write down all the species found in the WebApp or on the form, write abundance category and decay category/ lifestage, write XX for Missing Values, write species found that aren’t on the list at “bijschrijfsoorten”.
Additional Metadata
| Acknowledgements | This project would not be here without the volunteers (strandwachten) that full of dedication, through rain and storm, have walked and will walk the beaches to collect data about the coastal zone. |
|---|---|
| Getting Started | What can the decay categories tell us? The species are noted with the quality in which the material was found. The quality in which the material is, is due to decay after the death of the animal. Of the crabs, for example, we can find live individuals, nearly intact individuals, dead animals or exuvia. Live animals of bivalves can wash ashore as well as doublets with flesh remains, doublets without flesh remains or loose valves. The loose valves may be fresh (uncolored) or old to very old (fossil). The time in which material passes from passes from one stage to another (decay time), may vary among species or groups. Both among crabs and among bivalves three main stages can be distinguished, within which subdivisions are sometimes possible. The decay stages of certain species can give an indication of the period in which the species lived or/and about the transport directions of the material. In such cases, it is assumed that when something intact on the beach washes up that is known to decay rapidly, it cannot be old or have been transported from far. Decay categories Alive - Alive Exuvia - Exuvia (molt skin) Intact - Found dead, but fresh and intact Fragments - Parts of Claws, legs, shell Fresh/flesh - Fresh bivalve (doublet) with flesh remains Doublet - Bivalve shell (doublet) without flesh remains Old/Singlet - Loose valve Fossil - Loose valve colored black or dark blue If any questions arise about this, please contact anemoon@cistron.nl (for inquiries in Dutch) or nleestemaker@anemoon.org (for inquiries in English). Where do the washup up individuals come from? Most fresh material comes from the very near coastal zone. Occasionally after extremely strong winds, material from deeper zones can be brought in from about 10 meters depth, up to max about 3.5 km from the coast. The observations of fresh material (crabs, echinoderms, doublets (with meat remains), snail shells with meat remains, mainly say something about the very near coastal zone. However, there are indications that trends in the nearshore zone are broadly similar to population changes further offshore. For more information read: de Bruyne, R. H., van der Valk, L., & Meyling, A. G. (1993). Molluskentransport als indicatie voor zandtransport: een onderzoek naar transportbanen in de ondiepe kustgebieden voor Holland en de Waddeneilanden [kustgenese] (No. C009/93). RIVO. Gmelig Meyling, A. W., & De Bruyne, A. W. (1994). Zicht op zee: waarnemingen van veranderingen in de nabije kustzone door strandmonitoring met 381 strandwachten. Technical Report, 79, 79. Evaluatie van 10 jaar Strandwacht Katwijk-Noordwijk 1978-1987 (1993) Trends bepalen uit aanspoel signalen (2003) . Lange termijn trends van meerdere tweekleppigen vanaf 1945 -2002 Onder het zand beland (2009) . Invloed van strand- en vooroever-suppleties op het leven in de nabije kustzone en trends t/m 2008. Literature can be found on https://www.anemoon.org/publicaties/downloads/entryid/3. |
| Alternative Identifiers | https://ipt.nlbif.nl/resource?r=anemoon_smp_1977_2024 |