Distribution, habitat and biomass of Pittosporum undulatum, the most important woody plant invader in the Azores Archipelago

Lourenço, Patrícia; Medeiros, Vasco; Gil, Artur; Silva, Luís

doi:10.1016/j.foreco.2011.03.021

Cited by 51 publications

(43 citation statements)

References 44 publications

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“…However, a large number correspond to exotic species resulting from accidental or voluntary introduction after the colonization of the islands. Since the settlement in the 15 th century, vegetation has changed significantly essentially for cereal crops, pasture and forestry, being currently affected by the invasive behavior demonstrated by some of the introduced species (Furtado, 1984;Martins, 1993;Silva & Tavares, 1997;Silva & Smith, 2006;Lourenço et al, 2011;Schaefer et al, 2011;Costa et al, 2012;Gil et al, 2013).…”

Section: Flora and Vegetationmentioning

confidence: 99%

Applying an integrated landscape characterization and evaluation tool to small islands (Pico, Azores, Portugal)

Fernandes¹,

Guiomar²,

Freire³

et al. 2014

RGCI

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Each landscape is determined and can be characterised by two types of environmental factors: stable biophysical characteristics and manageable land use patterns. The consideration of both these characterisation domains allows the definition of a homogeneous system of reference (the stable characteristics) with which every possible land use pattern can be compared through the use of common evaluation algorithms. The Integrated Landscape Assessment (ILA) concept builds a framework for data retrieval and evaluation processing that maximizes the following advantages: through the use of a stable reference system, it allows the comparative simulation of different land use scenarios, as well as the permanent availability of the same reference system, independently from the intensity of land use changes throughout the years. It also allows the use of different evaluation algorithms according to different evaluation contexts or paradigms, without having to repeat or adapt the characterisation process.The present paper illustrates the basic concepts on which ILA is based and developed as well as its application to ecological planning and systematic conservation planning in the Pico Island (Azores Archipelago).Keywords: Systematic conservation planning, integrated landscape assessment, GIS, Macaronesia. Resumo Cada território é determinado e pode ser caracterizado por dois tipos de factores ambientais: características biofísicas estáveis e padrões de uso do solo susceptíveis de gestão. A consideração destes dois domínios de caracterização permite a definição de um sistema de referência homogéneo (as características

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Section: Flora and Vegetationmentioning

confidence: 99%

Applying an integrated landscape characterization and evaluation tool to small islands (Pico, Azores, Portugal)

Fernandes¹,

Guiomar²,

Freire³

et al. 2014

RGCI

View full text Add to dashboard Cite

show abstract

“…Pittosporum is a shade-tolerant species [14] and is the dominant species in 49% of forests in the Azores where it is exotic [19]. In contrast, a review of the ecological implications of shade tolerance suggested that invasive plants are not frequent in dark forest understoreys because they are usually shade intolerant, performing well in high-light and highly disturbed environments [20].…”

Section: Traits Of Successful "Invaders" and Properties Of Susceptiblmentioning

confidence: 99%

Section: Disturbance and Plant Invasionsmentioning

confidence: 99%

“…Pittosporum invasion has been ongoing since the nineteenth century and no equilibrium has developed [19]. Harvesting pittosporum for bioenergy has been proposed as a stabilizing process [19]. This would be similar to commercial thinning of unnaturally dense stands of the native species river red gum (Eucalyptus camaldulensis) and white cypress (Callitris glaucophylla) for timber in Australia [3].…”

Section: Disturbance and Plant Invasionsmentioning

confidence: 99%

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Plant Invasions: Symptoms and Contributors Rather Than Causes of Environmental Degradation

Jurskis¹

2012

Forests

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Native or exotic woody plants can proliferate in dry and moist eucalypt ecosystems shading out many other native species, contributing to chronic decline of eucalypts and reinforcing unnatural fire regimes and nutrient cycling processes. Whether native or exotic, they proliferate as a consequence of disturbances which impact directly on these ecosystems. The most extensive ongoing disturbance since European occupation of Australia has been the disruption of frequent mild burning by humans. This burning maintained dynamically stable nutrient cycling processes and a competitive balance in dry and moist eucalypt systems and prevented plant "invasions".

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“…It is widely distributed in plants such as coffee, tea, miscellaneous vegetables (Gordon and Wishart, 2010) and also Pittosporum undulatum, one of the most successful invader plants of the Azores archipelago used mainly as alternative feedstuff for cattle (Lourenço et al, 2011;Nunes et al, 2014). Presently the only CGA commercially available is the 5-CQA which has been extensively studied due to its wide range of pharmacological properties including anti-rust, anti-oxidant, anti-bacterial, and anti-viral.…”

Section: Introductionmentioning

confidence: 99%

Effects of chlorogenic acid on the maturation and fertilisation of bovine oocytes and their embryonic development with a comparative bovine granulosa cell co-culture

Nunes¹,

Dinis²,

Borba³

et al. 2017

Anim Reprod

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Chlorogenic acid (CGA) plays several biological roles, but lacks studies that demonstrate how this phenolic compound affects animal reproduction. The aim of the present study was to evaluate the effects of different CGA concentrations on bovine oocyte maturation and embryo development in vitro. This study also evaluates co-culture systems involving bovine granulosa cells (BGC) from fed with CGA containing plant, Pittosporum Undulatum. The ovaries were recovered after slaughter and the oocytes were removed, maturated, in vitro fertilized and cultured in medium containing CGA in 5 different concentrations 1.25; 2.5; 5; 10; 20 µm and a control group (0 µm) for seven days. Selected oocytes (n = 1040) were maturated in any of the 5 treatment or control groups. Significantly lower (P < 0.05) maturation rates were observed for the highest CGA concentrations 10 µm, and 20 µm, compared to the control group (Control = 93.4 ± 2.1% vs. 10 µm = 80.9 ± 2.2%; 20 µm 77.9 ± 3.3%). We observed that the higher the concentration of CGA present, the lower the rate of cleavage and development after 3 and 7 days, respectively. It was observed that the significant difference recorded in regards to embryonic development were evident between control and group (20; 51.1 ±5.6 vs. 19.4 ± 2.2%). In respects to the study involving co-culture of embryos with BGC the only difference recorded involved the block rate. No differences (P > 0.05) were identified between control and experimental groups in relation to the progesterone production by BGC. These results suggest that CGA may affect oocyte maturation and inhibit the progression of meiosis and consequently the entire embryo development in vitro.

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Distribution, habitat and biomass of Pittosporum undulatum, the most important woody plant invader in the Azores Archipelago

Cited by 51 publications

References 44 publications

Applying an integrated landscape characterization and evaluation tool to small islands (Pico, Azores, Portugal)

Applying an integrated landscape characterization and evaluation tool to small islands (Pico, Azores, Portugal)

Plant Invasions: Symptoms and Contributors Rather Than Causes of Environmental Degradation

Effects of chlorogenic acid on the maturation and fertilisation of bovine oocytes and their embryonic development with a comparative bovine granulosa cell co-culture

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