Discovery of a recovering climax Acropora community in Kanton Lagoon in the remote Phoenix Islands Protected Area

2019 ◽  
Vol 25 (3) ◽  
pp. 322
Author(s):  
Sangeeta Mangubhai ◽  
Yashika Nand ◽  
Randi Rotjan
Keyword(s):  
Thermal Stress ◽  
Protected Area ◽  
Degree Heating Weeks

A thermal stress that started in 2002 and peaked at 21 degree heating weeks resulted in near-100% mortality of corals in Kanton Lagoon. An expedition in 2015 documented a 52.8% recovery of hard corals in the lagoon. Despite temperatures reaching as high as 30.5°C there was almost no bleaching of Acropora stands within the lagoon, suggesting that recovering species are more resistant to thermal stress.

Diverse symbiont bleaching responses are evident from 2-degree heating week bleaching conditions as thermal stress intensifies in coral

2020 ◽  
Vol 71 (9) ◽  
pp. 1149 ◽  
Author(s):  
Sarah Gierz ◽  
Tracy D. Ainsworth ◽  
William Leggat
Keyword(s):  
Thermal Stress ◽  
Cellular Responses ◽  
Stress Exposure ◽  
Thermal Threshold ◽  
Host Coral ◽  
Cellular Processes ◽  
Ecological Scale ◽  
Bleaching Response ◽  
Degree Heating Weeks ◽  
Host Tissues

Coral bleaching is the dysfunction of the coral–algal endosymbiosis and is characterised as a loss of Symbiodiniaceae cells from host tissues or the loss of photosynthetic pigments. This breakdown of symbiosis occurs as a result of elevated temperature beyond the organism’s thermal threshold. The thermal tipping points within the symbiosis have not yet been well resolved, and the mechanisms underlying the various cellular processes of the corals bleaching response remain unknown. This study characterised the cellular responses of the symbiont Cladocopium sp. (syn. clade C3) within the host coral Acropora aspera during exposure to thermal stress. Exposure to temperatures between 2 and 3°C below the bleaching threshold, equating to 2-degree heating weeks (DHWs), results in changes to the symbiont cell morphology and cell division rates. Once corals were exposed to 4 DHWs, over 90% of the symbiont cells showed signs of degradation. Although sub-bleaching thermal stress is not sufficient to trigger bleaching alerts at an ecological scale, this stressor substantially affects the coral symbiosis. It is therefore vital that we begin to quantify how sub-bleaching thermal stress affects the fitness of Symbiodiniacea populations, their coral hosts and subsequently reefs worldwide.

Synergistic Human-Wildlife Relationships in a Protected Area: Ecological and Political Entanglements

2010 ◽  
Author(s):  
Carolyn Jost Robinson ◽  
Melissa Remis
Keyword(s):  
Protected Area

Making protected area networks effective for marine top predators

2011 ◽  
Vol 13 (3) ◽  
pp. 203-218 ◽  
Author(s):  
SK Hooker ◽  
A Cañadas ◽  
KD Hyrenbach ◽  
C Corrigan ◽  
JJ Polovina ◽  
...  
Keyword(s):  
Protected Area ◽  
Top Predators

Seagrass amphipod assemblages in a Mediterranean marine protected area: a multiscale approach

2014 ◽  
Vol 506 ◽  
pp. 175-192 ◽  
Author(s):  
N Sturaro ◽  
G Lepoint ◽  
A Pérez-Perera ◽  
S Vermeulen ◽  
P Panzalis ◽  
...  
Keyword(s):  
Protected Area ◽  
Marine Protected Area ◽  
Multiscale Approach

Habitat use of toothed whales in a marine protected area based on point process models

2019 ◽  
Vol 609 ◽  
pp. 239-256 ◽  
Author(s):  
TL Silva ◽  
G Fay ◽  
TA Mooney ◽  
J Robbins ◽  
MT Weinrich ◽  
...  
Keyword(s):  
Habitat Use ◽  
Point Process ◽  
Protected Area ◽  
Marine Protected Area ◽  
Process Models ◽  
Point Process Models

Turnera fasciculifolia (Turneraceae, Passifloraceae s. l.): A New Species From the Jalapão Region, Tocantins, Brazil

2020 ◽  
Vol 45 (4) ◽  
pp. 833-838
Author(s):  
Lamarck Rocha ◽  
Patrícia Luz Ribeiro ◽  
Maria Mercedes Arbo
Keyword(s):  
New Species ◽  
Protected Area ◽  
Extrafloral Nectaries ◽  
Distribution Map ◽  
Central Brazil ◽  
Axillary Branches ◽  
Revolute Margin ◽  
A New Species

Abstract—We present a new species, Turnera fasciculifolia, from the Jalapão region, the largest continuous protected area of Cerrado in Tocantins State, in central Brazil. The new species belongs to Turnera series Leiocarpae, and it can be recognized by the linear ericoid leaves with revolute margin, generally without extrafloral nectaries, and the basal leaves of the young axillary branches gathered in fascicles. We provide a description, illustrations, a distribution map, and a comparison with T. genistoides and T. revoluta, which also have ericoid leaves.

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