Increased anthropogenic pressure decreases species richness in tropical intertidal reefs

Portugal, Adriana Brizon; Carvalho, Fabrício Lopes; Carneiro, Pedro Bastos de Macêdo; Rossi, Sergio; Soares, Marcelo de Oliveira

doi:10.1016/j.marenvres.2016.07.005

Cited by 35 publications

(34 citation statements)

References 61 publications

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“…Despite temperature, increased nutrient concentrations can severely impact coastal ecosystems, causing increases in growth and abundance of opportunistic species of macroalgae (e.g., Morand and Briand ; Morand and Merceron ; Dailer et al ). On the other hand, the excess of nutrients can also be toxic to some species, which can cause decreases in species richness with increasing anthropogenic pressure (Portugal et al ). However, it has been shown that the macroalgal responses to nutrient addition are species‐specific, ranging from negative responses to increases in photosynthesis and growth (Schaffelke ).…”

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“…However, it has been shown that the macroalgal responses to nutrient addition are species‐specific, ranging from negative responses to increases in photosynthesis and growth (Schaffelke ). In addition, excess nutrient concentrations can compromise seaweed ecophysiology, reducing the wealth and diversity of species in coastal ecosystems (e.g., Halpern et al ; Martins et al ; Scherner et al ) and/or inducing community shifts due to differential impacts on benthic macroalgae (Portugal et al ). Changes in nutrient availability not only alter the physiological performance of macroalgae, thus affecting growth rates, but can also affect the production of primary and secondary metabolites.…”

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“…As already reported in other regions around the world, these heatwaves have great impacts on marine benthic communities, which along the Brazilian Southwestern coast are predominantly composed of seaweeds. In these coastal environments, high nutrient load due to increasing urbanization (Pagliosa et al ) has already lead to species loss and community shifts (Scherner et al ; Portugal et al ), and it can be expected that macroalgae in these impacted coastal areas will be even more dramatically affected under extreme events, such as heatwaves (Hobday et al ).…”

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Interactive effects of marine heatwaves and eutrophication on the ecophysiology of a widespread and ecologically important macroalga

Gouvêa

Schubert

Martins

et al. 2017

Limnology & Oceanography

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Extreme temperature events are becoming more recurrent and are more frequent with major impacts on coastal ecosystems, which are additionally impacted by increasing urbanization, resulting in high nutrient load. So far little is known about cumulative and/or interactive effects of global and local stressors on species' performance. Here, we evaluated the single and combined effects of simulated heatwaves and eutrophication on the ecophysiology of Laurencia catarinensis in a bi-factorial mesocosm experiment. The algae were exposed for 30 d to three different temperatures (208C, 248C, 288C) and nutrient concentrations (low, intermediate, high) and their nutrient uptake rates, photosynthetic performance, growth rates, pigment and phenolic compound concentrations, as well as antioxidant capacity was determined and compared between treatments. Under low nutrient concentration, physiological performance and growth decreased with increasing temperatures. In contrast, they increased with higher nutrient availability and moderate temperature increase close to the summer average temperature, but largely declined upon exposure to higher temperature (288C). This decline seemed to be related to oxidative stress, as indicated by an increase of compounds with antioxidant properties (lutein, zeaxanthin, phenols). Our data show that all measured parameters were affected by temperature and nutrient availability, with an interactive effect between these two factors, indicating that increasing temperature will influence macroalgal performance, and even more dramatically in coastal systems that are highly impacted by urbanization. However, the direction of the response will be determined by nutrient availability and will also depend on the magnitude of the temperature increase, that is, whether it surpasses the thermal threshold of the species.Marine macroalgae are dominant and essential components of coastal ecosystems around the world (Gattuso et al. 1998;Harley et al. 2012) and are currently threatened by a multitude of stressors, such as those related to global climate change (Harley et al. 2006(Harley et al. , 2012, but also locally by increasing nutrient and sediment loading, the overfishing and spread of invasive species (Worm and Lotze 2006;Schmidt and Scheibling 2007). Current changes in seawater temperature, due to climatic change, predict for the end of this century a continuous warming of near-surface air temperature, on the order of 2-78C with regional, seasonal and diurnal

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Interactive effects of marine heatwaves and eutrophication on the ecophysiology of a widespread and ecologically important macroalga

Gouvêa

Schubert

Martins

et al. 2017

Limnology & Oceanography

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“…In the past few decades, the Caribbean coast of Costa Rica, particularly in the vicinity of Puerto Viejo, Puerto Limón and Moín have been subjected to intense anthropogenic disturbances [21], such as increased urbanization, inappropriate wastewater management and an over-exploitation of marine resources [22]. Recent data obtained by [4] showed that urban development, particularly of jetties and restaurants built facing the beach, coupled with illegal sewage systems, are threatening benthic biodiversity significantly.…”

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New Records of Marine Macroalgae on the Caribbean on Coast of Costa Rica

Cabrera¹,

Díaz‐Larrea²,

Umanzor³

2019

AJPS

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The results obtained in this study highlight that further the macroalgae diversity in this region is even higher than what is reported to date. Here we present eight new records of marine macroalgae collected from the Caribbean coast of Costa Rica between March 2011 and May 2019. The morphological characteristics of Bryocladia cuspidata, Ceratodictyon variabile, Gracilaria hayi, Padina boergesenii, Zonaria tournefortii, Sargassum furcatum, Chaetomorpha aerea, and Bryopsis pennata var. secunda are described. The genera Bryocladia and Zonaria are reported for the first time for this region.

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“…Recent data obtained by Portugal et al (2016) show that urbanization, in particular jetties built to control coastal erosion, beachfront kiosks and restaurants, fish markets and storm sewers with illegal sewage connections, is significantly threatening benthic biodiversity.…”

Section: Introductionmentioning

confidence: 99%

New records of red seaweeds to the coast of Ceará State, northeastern Brazil

Soares

Carneiro

Fujii

2018

Hoehnea

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-(New records of red seaweeds to the coast of Ceará State, Northeastern Brazil). A recent fl oristic survey of Rhodophyta from Ceará State,, revealed the occurrence of 113 species distributed into 14 orders, 28 families and 63 genera. Of these, 18 species belonging to seven orders are new records; some of them poorly described and illustrated in the literature or cited only checklists. Therefore, aiming to expand the taxonomic knowledge about these poorly known species, we present detailed descriptions, illustrations, and comments on related taxa. The occurrence of Ceratodictyon scoparium is confi rmed for the South Atlantic coast. The male gametophytes of Dohrniella antillarum var. brasiliensis and tetrasporophytes of Gracilariopsis silvana are illustrated for the fi rst time. Ceramium fujianum is a new addition to northeastern Brazil. Among the new records, Callithamnion corymbosum, Ceramium clarionense, C. fujianum and C. scoparium showed a signifi cant expansion of their geographic distribution along the Brazilian coast. Most of the newly recorded species are fi lamentous, small-sized or tufted algae, highlighting the need for new collections to detect the presence of these components. Keywords: biodiversity, Rhodophyta, seaweeds, taxonomy RESUMO -(Novos registros de algas marinhas vermelhas na costa do Estado do Ceará, Nordeste do Brasil). Um recente levantamento fl orístico de Rhodophyta do Estado do Ceará (02º46'30''-07º52'15''S, 37º14'54''-41º24'45''W), Brasil, revelou a ocorrência de 113 espécies distribuídas em 14 ordens, 28 famílias e 63 gêneros. Dentre esses, 18 espécies pertencentes a sete ordens são novos registros, algumas pobremente descritas e ilustradas na literatura ou somente citadas em listas. Com o objetivo de expandir o conhecimento taxonômico acerca dessas espécies, são apresentadas descrições detalhadas, ilustrações e comparações com táxons relacionados. A ocorrência de Ceratodictyon scoparium é confi rmada na costa do Atlântico Sul. Os gametófi tos masculinos de Dohrniella antillarum var. brasiliensis e tetrasporófi tos de Gracilariopsis silvana são ilustrados pela primeira vez. Ceramium fujianum é um novo registro para a costa nordeste do Brasil. Dentre as novas ocorrências, Callithamnion corymbosum, Ceramium clarionense, C. fujianum and C. scoparium mostraram uma expansão signifi cativa da distribuição geográfi ca ao longo do litoral brasileiro. A maioria das espécies é fi lamentosa, diminutas ou formam tufos, demonstrando a necessidade de novas coletas para detectar a presença desses componentes.

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Increased anthropogenic pressure decreases species richness in tropical intertidal reefs

Cited by 35 publications

References 61 publications

Interactive effects of marine heatwaves and eutrophication on the ecophysiology of a widespread and ecologically important macroalga

Interactive effects of marine heatwaves and eutrophication on the ecophysiology of a widespread and ecologically important macroalga

New Records of Marine Macroalgae on the Caribbean on Coast of Costa Rica

New records of red seaweeds to the coast of Ceará State, northeastern Brazil

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