Studies on benthic communities of rocky shores on the Brazilian coast and climate change monitoring: status of knowledge and challenges

Coutinho, Ricardo; Yaginuma, Luciana Erika; Siviero, Fernanda Neves; Santos, Julio Cesar Q. P.; López, María Luisa García; Christofoletti, Ronaldo Adriano; Berchez, Flávio Augusto de Souza; Ghilardi-Lopes, Natália Pirani; Ferreira, Carlos E. L.; Gonçalves, J. E. A.; Masi, Bruno Pereira; Correia, Mônica Dorigo; Sovierzoski, Hilda Helena; Skinner, Luís Felipe; Zalmon, Ilana Rosental

doi:10.1590/s1679-875920161015064sp2

Cited by 32 publications

(40 citation statements)

References 30 publications

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“…Scientific predictions assume that an increase of up to 4°C in seawater temperature is likely to happen in the next century (Edenhofer et al, ), affecting vulnerable photosynthetic organisms that live in coastal ecosystems (Coutinho et al. ).…”

mentioning

confidence: 99%

“…Chemical pollution is one of the many local threats that may interact with global‐scale stressors like ocean warming, resulting in even more harmful biochemical and physiological effects for coastal organisms (Coutinho et al. , Laffoley and Baxter ). Heavy metals are major chemical pollutants and may have a higher solubility under warmer waters due to lower dissolved oxygen (Fritioff et al.…”

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confidence: 99%

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Ocean warming and copper pollution: implications for metabolic compounds of the agarophyte Gelidium floridanum (Gelidiales, Rhodophyta)

Kreusch

Poltronieri

Bouvie

et al. 2018

Journal of Phycology

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Ocean warming is increasing and scientific predictions suggest a rise of up to 4°C in sea water temperatures. The combination of a polluted and warmer environment may be detrimental for aquatic species, especially for primary producers such as seaweeds. This study investigated the potential for interactive effects of an increased seawater temperature in a copper‐rich environment on the photosynthetic pigments and metabolic compounds of the red seaweed Gelidium floridanum. Seaweed samples were cultivated in a factorial design with temperature (24°C and 30°C), copper (0 and 3 μM), and time (7 and 14 d). The exposure of G. floridanum to copper and 30°C for 7 d resulted in a lower concentration of chlorophyll a, smaller phycobiliprotein rods and lower concentration of soluble sugars. After 14 d of cultivation, a higher concentration of chlorophyll a and soluble sugars could be observed on seaweeds cultivated under 30°C. The accumulation of carotenoids and the release of phenolic compounds indicated specific protective mechanisms against temperature and copper, respectively. Overall, seaweeds grew less when exposed to copper 3 μM at 30°C.

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confidence: 99%

mentioning

confidence: 99%

Ocean warming and copper pollution: implications for metabolic compounds of the agarophyte Gelidium floridanum (Gelidiales, Rhodophyta)

Kreusch

Poltronieri

Bouvie

et al. 2018

Journal of Phycology

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“…and Galaxaura spp. (Amado Filho, Andrade, Karez, Farina, & Pfeiffer, ; Coutinho et al, ). Turf‐forming algae (notably, ‘filamentous’ and ‘articulated coralline’ taxa) grow directly on the rocky surface or as epiphytes (Széchy & Paula, ).…”

Section: Methodsmentioning

confidence: 99%

Decadal losses of canopy‐forming algae along the warm temperate coastline of Brazil

Gorman

Horta

Flores

et al. 2020

Global Change Biology

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The loss of canopy‐forming seaweeds from urbanized coasts has intensified in response to warming seas and non‐climatic pressures such as population growth and declining water quality. Surprisingly, there has been little information on the extent of historical losses in the South‐western Atlantic, which limits our ability to place this large marine ecosystem in a global context. Here, we use meta‐analysis to examine long‐term (1969–2017) changes to the cover and biomass of Sargassum spp. and structurally simple algal turfs along more than 1,000 kilometres of Brazil's warm temperate coastline. Analysis revealed major declines in canopy cover that were independent of season (i.e., displaying similar trends for both summer and winter) but varied with coastal environmental setting, whereby sheltered bays experienced greater losses than coastal locations. On average, covers of Sargassum spp. declined by 2.6% per year, to show overall losses of 52% since records began (ranging from 20% to 89%). This contrasted with increases in the cover of filamentous turfs (24% over the last 27 years) which are known to proliferate along human‐impacted coasts. To test the relative influence of climatic versus non‐climatic factors as drivers of this apparent canopy‐to‐turf shift, we examined how well regional warming trends (decadal changes to sea surface temperature) and local proxies of coastal urbanization (population density, thermal pollution, turbidity and nutrient inputs) were able to predict the changes in seaweed communities. Our results revealed that the most pronounced canopy losses over the past 50 years were at sites exhibiting the greatest degree of coastal warming, the highest population growth and those located in semi‐enclosed sheltered bays. These findings contribute knowledge on the drivers of canopy loss in the South‐western Atlantic and join with global efforts to understand and mitigate declines of marine keystone species.

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“…This area is considered as a marginal environment, which limits the development of coral reef ecosystems (Kleypas, McManus, & Meñez, ; Leão et al., ; Perry & Larcombe, ). From this area to the south, corals do not form reef frameworks as only scattered coral colonies occur over rocks, which represent the most extensive rocky shores in the Brazilian coast (Coutinho et al., ). Also, due to their framework, these habitats present lower structural complexity than eastern reefs.…”

Section: Methodsmentioning

confidence: 99%

“…Shallow reefs are one of the most diverse and productive ecosystems, as they have some of the highest levels of species richness and densities of species per unit area (Coutinho et al., ; Spalding, Ravilious, & Green, ). These hard substrate ecosystems are also characterized by their high diversity of ecological interactions, which mediates co‐existence among numerous organisms within the same habitat (Spalding et al., ).…”

Section: Introductionmentioning

confidence: 99%

Physical contact interactions with scleractinian corals in hard substrate communities

2018

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Shallow reefs are among the most diverse ecosystems, and their substrate is densely occupied by sessile organisms that frequently contact physically and interact mutually. Nevertheless, the relative importance of species abundance in shaping physical contacts in these ecosystems remains largely unknown. The aim of this study was to evaluate physical contact interactions, by using tools derived from the complex network theory, between hard corals and other benthic organisms in four areas along the Brazilian coast comprising coral reefs and rocky shores with different physical and biotic structures. It was also investigated whether interactions with corals occurred as expected by the abundance of the benthic organisms in each area, and whether corals belonging to families known as more aggressive interacted less with other organisms. In all areas, the abundance of both corals and contacting organisms directly influenced the abundance of interactions between benthic organisms, regardless of the physical or biological characteristics of the habitat and of the interacting organisms. In addition, coral species interacted more with the most abundant benthic group, the epilithic algal matrix, in all areas. Nevertheless, some evidence was found about biological mechanisms helping to explain the structure of the studied interactions, although to a lesser extent. The obtained networks presented high nestedness and connectance, but low modularity. These patterns indicate the low specificity of the studied interactions and reinforce the role of abundance as an important driver of contacts between sessile organisms in shallow hard bottom ecosystems.

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Studies on benthic communities of rocky shores on the Brazilian coast and climate change monitoring: status of knowledge and challenges

Cited by 32 publications

References 30 publications

Ocean warming and copper pollution: implications for metabolic compounds of the agarophyte Gelidium floridanum (Gelidiales, Rhodophyta)

Ocean warming and copper pollution: implications for metabolic compounds of the agarophyte Gelidium floridanum (Gelidiales, Rhodophyta)

Decadal losses of canopy‐forming algae along the warm temperate coastline of Brazil

Physical contact interactions with scleractinian corals in hard substrate communities

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