Naslov
State of knowledge on key eco-evolutionary processes and factors enhancing the resilience in coralligenous habitats: insights for efficient restoration protocols

Autori
Garrabou, J ; Linares, C ; Ledoux, JB ; Gomez-Gras, D ; López-Sendino, P ; López-Sanz, A ; Montero Serra, I ; Pagès, M ; Kipson, Silvija ; Bakran-Petricioli, Tatjana ; Ferreti, E ; Milanese, M ; Sarà, A ; Cerrano, C

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
MERCES Project, First Annual meeting, Conference Programme and Abstracts Heraklion, Crete, Greece 20-22 June 2017 / - Heraklion : Project MERCES, 2017, 17-17

Skup
MERCES Project, First Annual meeting, Conference Programme and Abstracts

Mjesto i datum
Heraklion, Grčka, 20.06.2017. - 22.06.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
marine habitats, coralligenous, restoration actions

Sažetak
Coralligenous assemblages are hard bottoms of biogenic origin that are mainly produced by the accumulation of calcareous encrusting algae growing at low irradiance levels. Coralligenous harbour approximately 10% of marine Mediterranean species, most of them are long-lived algae and sessile invertebrates, which exhibit low dynamics and belong to various taxonomic groups such as sponges, corals, bryozoans and tunicates. This habitat is extended around all the Mediterranean coasts with a bathymetrical distribution ranging from 20 to 120 m depth depending on the local environmental variables, mainly light conditions. Coralligenous is affected by several pressures such as nutrient enrichment, invasive species, increase of sedimentation, mechanical impacts, mainly from fishing activities, as well as climate change. In WP3 restoration actions on coralligenous are focused on different habitat forming species including three main taxonomic groups Cnidaria/Anthozoa (Paramuricea clavata, Corallium rubrum and Eunicella spp.), Porifera/Demospongiae (Aplysina spp., Spongia spp., Petrosia ficiformis) and Bryozoa (Pentapora fascialis ; Myriapora truncata). We conducted a literature review to summarize the information available for the selected species focusing on six main topics relevant for restoration activities: i) Reproduction – Recruitment - Population dynamics, ii) Impacts and Mortality, iii) Functional role - Biodiversity, iv) Trophic interactions, v) Population genetics and vi ) Previous restoration activities. The compiled information provided key reference data to design restoration settings and to define robust indicators to monitor restoration actions as well as to evaluate expected timescales to fulfill the restoration of the habitat. Considering the life-history traits, population dynamics and genetics of the selected species the implementation of restoration action should be mainly based on transplants of small medium individuals collected from donor specimens. The spatial arrangements of transplants may include relatively small patches (0.2-1 m in diameter) separated by distances similar to the sizes of the transplant patches. The density within the transplant patches may be moderate-high in order to fit natural densities while enhancing the reproductive success and recruitment rates. Finally, bearing in mind the tradeoff between initial transplantation efforts and the speed of recovery. Transplantation efforts will require lower initial effort due to higher survival after transplanting, but the period required to fully recover habitat complexity will tend to be far longer, i.e. decades. Survival and growth of transplants and recruitment would be the most suitable indicators of the success of the restoration actions.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA