The forgotten ecosystem

Marris, Emma

doi:10.1038/437944a

Cited by 119 publications

(64 citation statements)

References 2 publications

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“…If many birds use preferentially or exclusively open cerrado physiognomies (Bagno & Marinho-Filho 2001), if the Cerrado is being rapidly destroyed (Marris 2005 2) what is the proportion of functional diversity that would be lost removed at random. In this way, it was possible to answer whether the extinction of open cerrado species resulted in a different loss of FD than a random extinction of the same number of species.…”

Section: Methodsmentioning

confidence: 99%

Consequences of Simulated Loss of Open Cerrado Areas to Bird Functional Diversity

Batalha¹,

Cianciaruso²,

Motta-Junior³

2010

Nat. Conserv.

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Section: Methodsmentioning

confidence: 99%

Consequences of Simulated Loss of Open Cerrado Areas to Bird Functional Diversity

Batalha¹,

Cianciaruso²,

Motta-Junior³

2010

Nat. Conserv.

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“…The expansion and development of Brazilian agriculture is largely associated with intensive use of pesticides, especially herbicides (Procópio et al, 2009;Mancuso et al, 2011). The indiscriminate use of herbicides has had one of the main impacts on the health of organisms (Marris, 2005;Franco-Bernardes et al, 2015). There is consensus about the negative impact of herbicide exposure on non-target organisms, especially by drift processes (Power et al, 2013;Boutin et al, 2014;Marwitz et al, 2014;Egan et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Pouteria torta: a native species of the Brazilian Cerrado as a bioindicator of glyphosate action

et al. 2017

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In Brazil, the expansion of agricultural activity and the associated indiscriminate use of herbicides such as glyphosate is directly related to the loss of biodiversity in the Cerrado. The identification of plant species as bioindicators of herbicide action, especially species native to the area, can help in monitoring the impacts of xenobiotics in the remaining Cerrado. Thus, this study was designed to evaluate the possible use of the native Cerrado species Pouteria torta as a bioindicator of glyphosate action via changes in physiological performance. At 16 months after sowing, the effect of glyphosate was evaluated by applying the following doses: 0 (control), 25, 50, 100, 200, 400, 800, and 1200 g a.e. ha -1 . In response to glyphosate, P. torta exhibited reductions in photosynthesis and chloroplastid pigment content, as well as accumulation of shikimic acid and the occurrence of chlorosis and necrosis. These changes demonstrate the high sensitivity of P. torta to glyphosate and its potential for use as a bioindicator of this herbicide.Keywords: phytotoxicity, photosynthetic processes, biomarker, guapeva, herbicide. Pouteria torta: espécie native do Cerrado Brasileiro como bioindicadora da ação do glyphosate ResumoNo Brasil, a expansão da atividade agrícola, aliada a utilização indiscriminada de herbicidas como o glyphosate, possui relação direta com a perda da biodiversidade no Cerrado. A identificação de espécies vegetais bioindicadoras da ação de herbicidas, particularmente as nativas do Cerrado, pode auxiliar em processos de monitoramento dos impactos desse xenobiótico nas remanescentes do Cerrado. Assim, este estudo foi projetado para avaliar o possível uso de Pouteria torta, espécie nativa do cerrado, como bioindicadora da ação do glyphosate via mudanças na sua performance fisiológica. Após 16 meses de semeadura, o efeito do glyphosate foi avaliado quando aplicadas as seguintes doses: 0 (controle), 25, 50, 100, 200, 400, 800 e 1200 g e. a. ha -1 . Em reposta ao glyphosate, as plantas de P. torta apresentaram redução na sua performance do processo fotossintético e no conteúdo de pigmentos cloroplastídicos, além do acúmulo de ácido chiquímico e da ocorrência de cloroses e necroses. Essas alterações demonstram a alta sensibilidade de P. torta ao glyphosate, o que potencializa a sua utilização como bioindicadora da ação desse herbicida.

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“…The study was conducted in the Brazilian savannah that is a hotspot of global biodiversity in South America, with high rates of habitat conversion due to a recent expansion of soybean and sugar cane cultures and pasturelands (Myers et al 2000;Marris 2005 …”

Section: Area Of Studymentioning

confidence: 99%

Effect of Outdoor and Laboratorial Environment Science Activities on Middle School Students Understanding on Conservation

Angelini

Simião-Ferreira

Araújo³

et al. 2011

NatCon

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This work tested the learning in environmental science education activities involving middle school and undergraduate students. It was verified whether participation just once improved previous knowledge; if biodiversity understanding on the trail is more effective using manual guidance than using instructors' supervision, and if three consecutive activities increase understanding. Activities were conducted with three schools on the Brazilian savannah and consisted of oriented walk on the interpretive trail, aquatic insect sampling and identification under microscope. Daily activities increased student´s knowledge, especially on second and third days of activities, when the subjects addressed were completely new for students. The oral guidance from the instructors was more efficient than the use of manual by children possibly because teaching/learning process is usually almost entirely supplied by teacher. The greatest gain was verified at the third day of activity reinforcing that consecutive activities can effectively improve the retention of understanding.

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The forgotten ecosystem

Cited by 119 publications

References 2 publications

Consequences of Simulated Loss of Open Cerrado Areas to Bird Functional Diversity

Consequences of Simulated Loss of Open Cerrado Areas to Bird Functional Diversity

Pouteria torta: a native species of the Brazilian Cerrado as a bioindicator of glyphosate action

Effect of Outdoor and Laboratorial Environment Science Activities on Middle School Students Understanding on Conservation

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