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      Padrões de herbivoria e estratégias de defesa de comunidades de restinga em gradiente edáfico Translated title: Herbivory patterns and defense strategy of Restinga communities in edaphic gradients

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          Abstract

          RESUMO O estudo objetivou avaliar a distribuição espacial das defesas e das taxas de herbivoria em 20 espécies vegetais e a relação destas com o gradiente edáfico em quatro formações de restinga no Parque Estadual do Acaraí (PEA), Estado de Santa Catarina, Brasil. Atributos morfoanatômicos, histoquímicos e nutricionais foliares foram medidos em vinte folhas de dez indivíduos de cada espécie. Seis amostras de solo foram coletadas em cada formação para análise dos teores de macronutrientes, matéria orgânica, umidade e espessura da serapilheira. As análises estatísticas foram realizadas utilizando software R. Os resultados indicaram que as taxas de herbivoria variam de acordo com os atributos morfoanatômicos e histoquímicos foliares, os quais respondem às características nutricionais e hídricas do solo, influenciando o agrupamento de defesas anti-herbivoria em cada comunidade vegetal.

          Translated abstract

          ABSTRACT This study aimed to evaluate the spatial distribution of defenses and herbivory rates in 20 plant species and their relationship with the edaphic gradient in four sandbank formations in the State Park of Acaraí (PEA) in Santa Catarina State, Brazil. The morphoanatomical, histochemical and nutritional attributes of the leaves were measured on twenty leaves of ten individuals of each species. Six soil samples were collected in each formation for analysis of macronutrient contents, organic matter, moisture and litter thickness. Statistical analyzes were performed with the R software. The results indicated that herbivory rates vary according to leaf morphoanatomical and histochemical attributes, which respond to the soil’s nutritional and water characteristics and, therefore, influence the anti-herbivory groups in each plant community.

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          Most cited references54

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          Sistema brasileiro de classificação de solos

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            HERBIVORY AND PLANT DEFENSES IN TROPICAL FORESTS

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              The abundance of invertebrate herbivores in relation to the availability of nitrogen in stressed food plants

              It has previously been postulated that when plants are stressed by certain changes in patterns of weather they become a better source of food for invertebrate herbivores because this stress causes an increase in the amount of nitrogen available in their tissues for young herbivores feeding on them. And this may cause outbreaks of such phytophagous invertebrates.Evidence is now presented that a similar physiological mechanism appears to operate when a wide variety of apparently unrelated environmental factors impinge on plants or parts of plants in such a way as to perturb their metabolism. A broken branch, lightning strike, fire, nutrient deficiencies or an otherwise adverse site; all may have this effect. With the advent of modern man the available agencies increase and diversify to include pesticides, irradiation and air pollutants.One common metabolic response by plants to all such agents impinging on them seems to be equivalent to that found in senescing plant tissues - the breakdown and mobilization of nitrogen in soluble form away from the senescing/stressed tissues. Young herbivores which chance to feed on such stressed/senescing tissues have a greater and more readily available supply of nitrogen in their food than they would have had if feeding on unstressed plants. As a result many more of them survive, and there is an increase in abundance of their kind. Such increases may be quite localised and short-lived or more widespread and persistent, depending on the extent and duration of the stress experienced by the plants. And in the face of this improved nutrition and survival of the very young, predators and parasites seem to have only a minor influence on subsequent changes in abundance of their herbivorous prey.Another effect of increased mobilization of nitrogen in stressed plants is an increase in the quantity of the seed that they set. This has led to the conclusion that increased abundance of some species of birds at such times is due to a greater supply of seeds as winter food for recent fledglings. But it may be that the increased abundance is due to the synchronous increase in phytophagous insects providing a richer source of protein food for laying hens and growing nestlings.
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                Author and article information

                Journal
                hoehnea
                Hoehnea
                Hoehnea
                Instituto de Pesquisas Ambientais (São Paulo, SP, Brazil )
                0073-2877
                2236-8906
                2022
                : 49
                : e212021
                Affiliations
                [2] Curitiba Paraná orgnameUniversidade Federal do Paraná orgdiv1Departamento de Ecologia Brazil
                [1] Joinville orgnameUniversidade da Região de Joinville orgdiv1Departamento de Ciências Biológicas orgdiv2Laboratório de Morfologia e Ecologia Vegetal Brazil
                Article
                S2236-89062022000100203 S2236-8906(22)04900000203
                10.1590/2236-8906-21/2021
                de3c27ac-c5ef-41f7-9bba-5aa1b4831ba7

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 04 March 2021
                : 16 November 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 54, Pages: 0
                Product

                SciELO Brazil

                Categories
                Artigo

                filtro ambiental,interação planta-herbívoro,qualidade edáfica,relação planta-solo,edaphic quality,environmental filter,plant-herbivore interaction,plant-soil relationship

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