Realm: Marine
Climate: Temperate
Biome: Temperate shelf and seas ecoregions
Central latitude: 33.184952
Central longitude: 133.531673
Duration: 6 years, from 2008 to 2013

4485 records

326 distinct species

Across the time series Ruditapes philippinarum is the most frequently occurring species

Methods

BioTIME Manager Note: In v2, this dataset retains the records of infauna described below. This study was formerly part of study 367, which was split as part of the database v2 revision. Dataset description: This is a survey conducted on tidal flats as part of the 1000 Monitoring Sites Coastal Zone Survey. A total of eight survey sites have been set up across the country, with annual surveys conducted continuously every fiscal year and five-yearly surveys conducted once every five years. 2. Annual survey description: Two to three survey areas are set up at eight survey sites across the country. In each area, square frames (five locations) are set up at two to three survey points, and a quantitative biosurvey (2mm sieve) is conducted to record the benthos that appear within the square frames (benthos: epifauna, infauna 2mm or larger). In addition, a qualitative biosurvey is conducted to record the benthos that appear around each survey point. 3. Annual Survey Overview: Since the 2008 fiscal year, surveys have been conducted once a year; The survey period is generally set between April and June; In the 2008 fiscal year, trials were conducted at the Akkeshi, Matsukawaura, Banzu tidal flat, Nanki Tanabe, Nakatsu tidal flat, Nagura tidal flat, and Ishigaki Kawahira Bay sites; The Shio River tidal flat survey began in the 2009 fiscal year; As of the 2021 fiscal year, there are 8 sites for the tidal flat survey; Both quantitative and qualitative surveys are conducted; Each site is divided into 1 to 3 areas (A, B, C), and within each area, 2 to 3 survey points are set (upper intertidal zone: U, middle intertidal zone: M, lower intertidal zone: L); At each site, a quantitative survey is conducted to observe changes in biomass, and a qualitative survey is conducted to assess the diversity of species within the site. 4. Number of Benthos Individuals Appearing within the Square Frame and Associated Data (Biological Quantitative Survey (2mm sieve)). At each survey point, five 50 cm square frames are randomly placed to record the epibenthic animals. Then, a 15 cm diameter core sampler (to a depth of 20 cm) is used to collect the organisms along with the sediment. The extracted organisms are then passed through a 2 mm sieve, and the infaunal species are recorded. Epibenthic animals are recorded as the number of individuals appearing within 0.25 m² (50 cm square frame), while infaunal animals are recorded as the number of individuals appearing within 0.0177 m² (15 cm diameter core). Unit of abundance = IndCountInt, Unit of biomass = NA. The data available here are: Number of benthic organisms that appeared within the square frame and associated data (quantitative biosurvey (2mm sieve)).

Citation(s)

@Misc{BioTIME_cit231, Study_id = {917}, Citation_id = {231}, Author = {{Monitoring Site 1000 Project} and {Biodiversity Center} and {Ministry of Environment of Japan}}, Title = {Monitoring site 1000 Coastal zone research - Tidal flat survey}, Year = {2015}, Url = {http://www.biodic.go.jp/moni1000/findings/data/index.html}, Urldate = {2016-08-01}, Language = {Japanese}, Version = {HIG01.zip} }