A dynamic simulation model of the widgeon grass Ruppia maritima and its epiphytes in the estuary of the Patos Lagoon, RS, Brazil

Silva, Eduardo Teixeira da; Asmus, Milton Lafourcade

doi:10.1016/s0304-3800(00)00425-7

Cited by 25 publications

(13 citation statements)

References 51 publications

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“…According to several authors, macroalgal composition in seagrass meadows is also influenced by nutrient input, interactions between grazers, banks of propagules, and other factors (DAHL, 1973;HARLIN, 1975;PEDRINI et al, 1997;VIRNSTEIN;CARBONARA, 1985;ZIEMAN;ZIEMAN, 1989;BOROWITZKA et al, 1990;REIS;YONESHIGUE-VALENTIN, 1998;ASMUS, 2001;BIBER et al, 2004;VAN ELVEN et al, 2004;HAYS, 2005;KOCH et al, 2006). On the rocky habitats studied here, hydrodynamic patterns appeared to be the main environmental influence.…”

Section: Discussionmentioning

confidence: 59%

“…Some investigators have recorded the effects of epiphyte shedding on seagrass, as related to leaf age (SILBERSTEIN et al, 1986;ASMUS, 2001), as these algae are often more abundant on mature shoots or leaves (ZIEMAN; ZIEMAN, 1989;BOROWITZKA et al, 1990;BANDEIRA, 2002), when the seagrass completes its life-cycle. Simultaneous fluctuations of algal biomass and the density of seagrass shoots suggest that they contribute to the plucking of the older shoots, by increasing friction with waves.…”

Section: Discussionmentioning

confidence: 99%

“…Both positive and negative effects of seagrass-algae relationships are reported in the literature (SAND-JENSEN, 1977;SILBERSTEIN et al, 1986;WILLIAMS, 1990;CINELLI, 1997CINELLI, , 1998CINELLI, , 1999ASMUS, 2001;BRUN et al, 2003;TAPLIN et al, 2005;STAFFORD;BELL, 2006;PERGENT et al, 2008). In general, the combination of macroalgae and seagrasses may, to some extent, increase the area available for colonization, increasing food retention and shelter for fauna, and enhancing the productivity of the coastal environment (MAZZELLA; ALBERTE, 1985;ZIEMAN;ZIEMAN, 1989;VIRNSTEIN;CARBONARA, 1985;NORKKO et al, 2000;WILLIAMS;HECK, 2001;BOROWITZKA et al, 2006;ROSA;BEMVENUTI, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Influence of the shoot density of Halodule wrightii Ascherson from rocky and sandy habitats on associated macroalgal communities

et al. 2013

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A B S T R A C TThis study evaluated the influence of the shoot density of the shoal grass Halodule wrightii on the composition of the associated algal community, in rocky and sandy habitats on the coast of Ceará in northeastern Brazil. The phycological community included 18 species in 10 families, members of Rodophyta (72.2%), Chlorophyta (22.2%) and Phaeophyceae (5.5%). The largest proportion were epilithic (50%), followed by epiphytes on H. wrightii (38.4%), epipsammics (8%), and epiphytes on other algae (4%). Epiphytes on H. wrightii occurred mainly associated with rhizomes, but also tendrils of H. musciformis occurred attached to the leaves. The phycological community varied according to the density of H. wrightii, independently of particular characters of the meadows, although both habitat and other environmental variables seemed to influence the macroalgae composition and diversity. The rocky habitat was more diverse than the sandy habitat, but in the sandy habitat the shoal grass was important for algal settlement in areas where hard substrates were scarce or absent. R E S U M OEste estudo avaliou a influência da densidade do capim-agulha Halodule wrightii sobre a composição da comunidade algal associada, em habitats rochosos e arenosos da costa do Ceará, Nordeste do Brasil. A comunidade ficológica incluiu 18 espécies em de 10 famílias, integrantes de Rodophyta (72.2%), Chlorophyta (22.2%) e Phaeophyceae (5.5%). A maior proporção foi epilítica (50%), seguida pelas epífitas de H. wrightii (38.4%), epífitas de outras algas (8%) e epipsâmicas (4%). Epífitas de H. wrightii ocorreram associadas com os rizomas, mas gavinhas de H. musciformis ocorreram presas às folhas. A comunidade ficológica variou de acordo com a densidade de H. wrightii independentemente das características particulares dos prados estudados, embora tanto o habitat quanto outras variáveis ambientais pareceram influenciar a composição e diversidade das macroalgas. O habitat rochoso foi mais diverso que o arenoso, mas no habitat arenoso o capimagulha foi importante para o assentamento de algas em áreas onde substratos duros foram raros ou ausentes.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of the shoot density of Halodule wrightii Ascherson from rocky and sandy habitats on associated macroalgal communities

et al. 2013

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“…Spatial and seasonal variability of seagrass abundance and distribution, accounting for water column and sediment parameters, have already been described (COSTA; SEELIGER, 1989;COSTA et al, 1997;SILVA;ASMUS, 2001), and an ecological model of biomass production has been developed as a function of water depth and transparency (SILVA; ASMUS, 2001). The development of seagrass meadows in the Patos Lagoon, their variability and the equilibrium among plant and algal populations are highly dependent on hydrodynamics, particularly on the critical initial stages (COPERTINO; SEELIGER, 2010).…”

Section: Patos Lagoon Estuary (Rio Grande Do Sul State)mentioning

confidence: 99%

“…The development of seagrass meadows in the Patos Lagoon, their variability and the equilibrium among plant and algal populations are highly dependent on hydrodynamics, particularly on the critical initial stages (COPERTINO; SEELIGER, 2010). When water and sediment movements are moderate (usually in late spring and throughout the summer), light, temperature and salinity enhance the growth rates, biomass allocation and flower production (KOCH; SEELIGER, 1989;SILVA;ASMUS, 2001;SEELIGER, 2006). Due to this synergistic effect, seagrass growth is concentrated in the spring and summer with meadows decaying or disappearing in the winter.…”

Section: Patos Lagoon Estuary (Rio Grande Do Sul State)mentioning

confidence: 99%

Seagrass and Submerged Aquatic Vegetation (VAS) Habitats off the Coast of Brazil: state of knowledge, conservation and main threats

et al. 2016

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Financial Support: This study was supported by the Brazilian Network for Coastal Benthic Studies -ReBentos (Programa SISBIOTA), Rede CLIMA and INCT for Climate Changes; sponsored by CNPq and FAPESP. Seagrass meadows are among the most threatened ecosystems on earth, raising concerns about the equilibrium of coastal ecosystems and the sustainability of local fisheries. The present review evaluated the current status of the research on seagrasses and submerged aquatic vegetation (SAV) habitats off the coast of Brazil in terms of plant responses to environmental conditions, changes in distribution and abundance, and the possible role of climate change and variability. Despite an increase in the number of studies, the communication of the results is still relatively limited and is mainly addressed to a national or regional public; thus, South American seagrasses are rarely included or cited in global reviews and models. The scarcity of large-scale and long-term studies allowing the detection of changes in the structure, abundance and composition of seagrass habitats and associated species still hinders the investigation of such communities with respect to the potential effects of climate change. Seagrass meadows and SAV occur all along the Brazilian coast, with species distribution and abundance being strongly influenced by regional oceanography, coastal water masses, river runoff and coastal geomorphology. Based on these geomorphological, hydrological and ecological features, we characterised the distribution of seagrass habitats and abundances within the major coastal compartments. The current conservation AbstrActPradarias de gramas marinhas e vegetação aquática submersa (VAS) estão entre os ecossistemas mais ameaçados do planeta, gerando preocupação sobre o equilíbrio dos ecossistemas costeiros e a sustentabilidade das pescarias. A presente revisão avaliou o estado do conhecimento sobre as pradarias marinhas e VAS do Brasil, considerando as respostas das plantas às condições ambientais, e o possível papel da geomorfologia costeira e variabilidade climática sobre a distribuição e abundância das populações. Apesar do crescente aumento no número de publicações, a comunicação dos resultados ainda é relativamente limitada e destina-se principalmente ao público nacional ou regional. Como resultado, as pradarias de gramas marinhas da América do Sul raramente são incluídas ou citadas em revisões e modelos globais. A escassez de estudos em larga escala e de longo prazo, permitindo a detecção de mudanças na estrutura, abundância e composição dos habitats e espécies associadas, limita a investigação das comunidades no que diz respeito aos efeitos potenciais das mudanças climáticas. Pradarias marinhas e VAS ocorrem ao longo de toda a costa brasileira, mas a distribuição e abundância das espécies são influenciadas pela oceanografia regional, massas de água costeiras, descarga de rios e geomorfologia costeira. Com base nas características oceanográficas, geomorfológicas, hidrológicas e ecológicas, o estudo discutiu a distr...

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Seagrass Production Models

Jarvis¹

2015

Encyclopedia of Estuaries

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A dynamic simulation model of the widgeon grass Ruppia maritima and its epiphytes in the estuary of the Patos Lagoon, RS, Brazil

Cited by 25 publications

References 51 publications

Influence of the shoot density of Halodule wrightii Ascherson from rocky and sandy habitats on associated macroalgal communities

Influence of the shoot density of Halodule wrightii Ascherson from rocky and sandy habitats on associated macroalgal communities

Seagrass and Submerged Aquatic Vegetation (VAS) Habitats off the Coast of Brazil: state of knowledge, conservation and main threats

Seagrass Production Models

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