Classification of Natural and Semi‐natural Vegetation

Peet, Robert K.; Roberts, David W.

doi:10.1002/9781118452592.ch2

Cited by 66 publications

(78 citation statements)

References 101 publications

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“…One such explanation is linked to the classification process. Classification is a conceptual simplification whereby rich and complex vegetation is characterized using a nomenclature consisting of a limited set of classes (Mucina 1997;Peet & Roberts 2012). A second explanation is linked to the geometrical simplification known as map generalization, whereby fuzzy boundaries are drawn as simplified lines on a map (Painho 1995;Weibel & Dutton 1999).…”

Section: Map Generalization Of Dwarf Shrub Heathmentioning

confidence: 99%

“…Vegetation mapping is a descriptive process whereby the land surface is divided into partitions and each part is classified according to the composition and structure of the vegetation. Additionally, vegetation mapping is used as a tool in conservation planning (Ferrier 2002), natural resource management (Thackway et al 2007), documentation and monitoring of changes in nature Ihse 2007;Ståhl et al 2011), ecological modelling (Bryn et al 2013), and as a general data source for many research programmes (Peet & Roberts 2012).…”

Section: Introductionmentioning

confidence: 99%

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Composition and spatial structure of dwarf shrub heath in Norway

Aune-Lundberg

Strand

2017

Norsk Geografisk Tidsskrift - Norwegian Journal of Geography

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Detailed descriptions of individual vegetation types shown on vegetation maps can improve the ways in which the composition and spatial structure within the types are understood. The authors therefore examined dwarf shrub heath, a vegetation type covering large areas and found in many parts of the Norwegian mountains. They used data from point samples obtained in a wall-to-wall area frame survey. The point sampling method provided data that gave a good understanding of the composition and structure of the vegetation type, but also revealed a difference between variation within the vegetation type itself (intra-class variation) and variation resulting from the inclusion of other types of vegetation inside the map polygons (landscape variation). Intra-class variation reflected differences in the botanical composition of the vegetation type itself, whereas landscape variation represented differences in the land-cover composition of the broader landscape in which the vegetation type was found. Both types of variation were related to environmental gradients. The authors conclude that integrated point sampling method is an efficient way to achieve increased understanding of the content of a vegetation map and can be implemented as a supporting activity during a survey. ARTICLE HISTORY

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Section: Map Generalization Of Dwarf Shrub Heathmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Composition and spatial structure of dwarf shrub heath in Norway

Aune-Lundberg

Strand

2017

Norsk Geografisk Tidsskrift - Norwegian Journal of Geography

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“…(1603 km 2 ), was excluded from further consideration as no nests were found in this assemblage despite searches. Ordination and cluster analyses were performed in PRIMER 6.1.10 (Clarke 1993;Peet and Roberts 2013).…”

Section: Habitat and Land-use Variablesmentioning

confidence: 99%

Effects of habitat and livestock on nest productivity of the Asian houbara Chlamydotis macqueenii in Bukhara Province, Uzbekistan

et al. 2016

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To inform population support measures for the unsustainably hunted Asian houbara Chlamydotis macqueenii (IUCN Vulnerable), we examined potential habitat and landuse effects on nest productivity in the Kyzylkum Desert, Uzbekistan. We monitored 177 nests across different semiarid shrub assemblages (clay-sand and salinity gradients) and a range of livestock densities (0-80 km −2). Nest success (mean 51.4 %, 95 % CI 42.4-60.4 %) was similar across 4 years; predation caused 85 % of those failures for which the cause was known, and only three nests were trampled by livestock. Nesting begins within a few weeks of arrival when food appears scarce, but later nests were more likely to fail owing to the emergence of a key predator, suggesting that foraging conditions on wintering and passage sites may be important for nest productivity. Nest success was similar across three shrub assemblages and was unrelated to landscape rugosity, shrub frequency or livestock density but was greater with taller mean shrub height (range 13-67 cm) within 50 m. Clutch size (mean = 3.2 eggs) and per-egg hatchability in successful nests (87.5 %) did not differ with laying date, shrub assemblage or livestock density. We therefore found no evidence that livestock density reduced nest productivity across the range examined, while differing shrub assemblages appeared to offer similar habitat quality. Asian houbara appear well-adapted to a range of semi-desert habitats and tolerate moderate disturbance by pastoralism. No obvious in situ mitigation measures arise from these findings, leaving regulation and control as the key requirement to render hunting sustainable.

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“…2017 Introdução A classificação da vegetação tem sido um importante campo de pesquisa científica e atualmente exerce grande influência na organização do conhecimento biológico, planejamento e execução de programas de pesquisa e conservação, formulação de leis para proteção de habitats ameaçados, monitoramento do uso de recursos naturais e estabelecimento de metas para restauração (Peet & Roberts 2013). O processo de classificação se inicia com a descrição dos atributos da vegetação, passa pela avaliação desses atributos seguindo um certo conjunto de critérios, e termina no reconhecimento de categorias ou tipos vegetacionais (Oliveira-Filho 2009).…”

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“…Entretanto, classificar a vegetação constitui um trabalho bastante desafiador, pois ela é um componente dinâmico da paisagem que pode ter composição e fisionomia variando no espaço e no tempo, sendo fruto do determinismo de gradientes ambientais, da variabilidade temporal do clima, da história ecológica e de eventos casuais (Peet & Roberts 2013). Essa condição multivariável pode levar a múltiplos caminhos semânticos no reconhecimento dos tipos vegetacionais, e a preferência por um desses caminhos, em detrimento de outro, deve sempre considerar o pragmatismo como linha mestra (Mucina 1997).…”

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Uma revisão sobre a controversa classificação fisionômica da Floresta de Linhares, norte do Espírito Santo

et al. 2017

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ResumoApresentamos uma revisão das visões controversas acerca da classificação fisionômica da Floresta de Linhares, aqui definida como a floresta sobre tabuleiros costeiros que ocorre entre os rios Doce e Barra Seca, no norte do Espírito Santo. Compilamos informações sobre o clima estacional dessa região e analisamos a inter-relação das variações interanuais e da dinâmica sazonal da precipitação com atributos ecológicos da floresta. Nossas interpretações revelaram que dados mensais médios de precipitação não exprimem a realidade dos períodos biologicamente secos ano a ano e suas consequências sobre a fisionomia da vegetação. Percebemos que a Floresta de Linhares pode se manifestar como semidecídua ou perenifólia, a depender da severidade da seca em um dado período. Então, propomos que a flexibilidade do regime de renovação foliar da Floresta de Linhares deve ser considerada em sua classificação. Sugerimos classificar a floresta duplamente como estacional semidecidual nos períodos anuais ou supra-anuais caracterizados por deficit hídrico pronunciado, e como floresta estacional perenifólia nos períodos anuais ou supra-anuais sem deficit hídrico significativo. Palavras-chave: deficit hídrico, floresta de tabuleiro, floresta estacional semidecidual, floresta estacional perenifólia, sazonalidade de precipitação. AbstractWe present a review of the controversial points of view concerning the physiognomic classification of Linhares Forest, which is defined here as the forest over coastal tablelands that is found between the Rio Doce and the Rio Barra Seca, in the north of Espírito Santo. We compiled information about the seasonal climate of such region and analyzed the relationship of both the interannual variation and the seasonality of the rainfall with the ecological attributes of the forest. Our interpretations unveiled that the average monthly rainfall does not express the reality of the biologically dry periods year after year nor does it express the consequences on the vegetation physiognomy. We perceived that Linhares Forest may manifest itself as semideciduous or evergreen, depending on the drought severity within a given period. Thus, we propose that the flexibility of Linhares Forest leaf flush regime must be considered in its classification. We suggest a double classification for the forest: one as a seasonal semideciduous forest during annual or supra-annual periods that are characterized by pronounced water deficit and the other as a seasonal evergreen forest during annual or supra-annual periods with no significant water deficit.

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Classification of Natural and Semi‐natural Vegetation

Cited by 66 publications

References 101 publications

Composition and spatial structure of dwarf shrub heath in Norway

Composition and spatial structure of dwarf shrub heath in Norway

Effects of habitat and livestock on nest productivity of the Asian houbara Chlamydotis macqueenii in Bukhara Province, Uzbekistan

Uma revisão sobre a controversa classificação fisionômica da Floresta de Linhares, norte do Espírito Santo

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