Conservation Evidence strives to be as useful to conservationists as possible. Please take our survey to help the team improve our resource.

Providing evidence to improve practice

Action: Designate a Marine Protected Area and prohibit aquaculture activity Subtidal Benthic Invertebrate Conservation

Key messages

Read our guidance on Key messages before continuing

  • One study examined the effects of prohibiting aquaculture activity in a protected area on subtidal benthic invertebrate populations. The study was in Tapong Bay lagoon (Taiwan).

 

COMMUNITY RESPONSE (0 STUDIES)

POPULATION RESPONSE (1 STUDY)

  • Crustacean abundance (1 study): One before-and-after study in Tapong Bay lagoon found that two and a half years after removing oyster aquaculture in a marine protected area, the biomasses of amphipods and shrimps had decreased, and that the biomass of crabs had not changed.
  • Mollusc abundance (1 study): One before-and-after study in Tapong Bay lagoon found that two and a half years after removing oyster aquaculture in a marine protected area, the biomasses of gastropods and bivalves had decreased.
  • Worm abundance (1 study): One before-and-after study in Tapong Bay lagoon found that two and a half years after removing oyster aquaculture in a marine protected area, the biomass of polychaete worms had stayed the same.

Supporting evidence from individual studies

1 

A before-and-after study in 1999–2004 of 39 sampling stations in Tapong Bay lagoon, southwestern Taiwan (Lin et al. 2009) found that removing oyster aquaculture in a marine protected area led to decreases in the biomasses of four out of six invertebrate groups, after two and a half years. Biomass of sea snails (gastropod molluscs) declined by 98% (before: 4.40; after: 0.06 g/m2), bivalve molluscs by 97% (before: 274; after: 8.56 g/m2), amphipods (crustaceans) by 98% (before: 0.51; after: 0.01 g/m2), and shrimps by 50% (before: 0.12; after: 0.06 g/m2). There were no significant changes in the biomasses of polychaete worms (before: 0.32; after: 1.55 g/m2), and crabs (before: 1.59; after: 0.93 g/m2). In 1997, Tapong Bay became a National Scenic Area and oyster culture, which was intensive in the area, was prohibited. In June 2002, all oyster racks were removed. Invertebrates (>0.5 mm) in the sediment were surveyed using a core (10 cm diameter; 20 cm depth) at 30 stations (3 cores/station) in August 1999, October 2002, and January and November 2004. Crabs and shrimps were sampled in 2001–2004 (unspecified number of surveys) using a net at nine stations (4 nets/station). All invertebrates were identified and wet-weighed.

Referenced papers

Please cite as:

Lemasson, A.J., Pettit, L.R., Smith, R.K., and Sutherland, W.J. (2019) Subtidal Benthic Invertebrate Conservation: Global Evidence for the Effects of Interventions. Synopses of Conservation Evidence Series. University of Cambridge, Cambridge, UK.