A comparative analysis of decline in the distribution ranges of orchid species in Estonia and the United Kingdom

Kull, Tiiu; Hutchings, Michael J.

doi:10.1016/j.biocon.2005.09.046

Cited by 160 publications

(136 citation statements)

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“…They have an important role in documenting the historical distribution of taxa, which allows us to draw conclusions on conservation issues, i.e. the decline and vulnerability of species by comparing historical and recent data (Jacquemyn et al 2005;Kull & Hutchings 2006). This account of the valuable applications of herbaria is far from complete, and certainly other, unforeseen uses may emerge.…”

Section: Taxamentioning

confidence: 99%

Herbarium database of hungarian orchids I. Methodology, dataset, historical aspects and taxa

et al. 2012

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The paper introduces the Herbarium Database of Hungarian Orchids which contains all records of orchid (Orchidaceae) specimens stored in the Hungarian herbaria. All data from the herbarium sheets were entered into the database, and secondary data were also added it; including a taxonomic revision in line with current theory. Only unique data was considered, yielding 7,658 records of 55 species from 452 collectors. It covers the whole territory of Hungary, and spans two centuries ranging from 1804 to the present. The temporal frequency of collections shows a peak in the middle of the 20 th century. The most effective collectors came from this era, and the name of Rezső Soó and his followers can be mentioned as most prominent. As in other countries, a decline in collection is seen in the last decades of the 20 th century. A geographically uneven coverage of collections was observed, and the such heavily underrepresented regions could be identified with the help of the database. However, the value of collection for scientific purposes is emphasised, as can be readily seen in this database. Taxonomically, seven recently described species could be identified, which were collected before their description under other names more than one century ago. On the other hand, the earlier presence of species now considered to be extinct could be unequivocally proven, as in the case of Malaxis monophyllos. The multiple application of herbaria is illustrated by some examples, reinforcing unambiguously the usefulness of collecting for scientific purposes. Furthermore, new, as yet unforeseen, application of herbarium collections can be expected.

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Section: Taxamentioning

confidence: 99%

Herbarium database of hungarian orchids I. Methodology, dataset, historical aspects and taxa

et al. 2012

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“…The family Orchidaceae, with about 24000 species, is the largest in the plant kingdom [1] and the vast majority of orchid taxa is well known for its rarity and is threatened in several country throughout the world [2,3].…”

Section: Introductionmentioning

confidence: 99%

Analysis of fungal diversity in Orchis tridentata Scopoli

et al. 2012

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We have assessed the identities of fungi associated with Orchis tridentata, an endangered orchid species growing in open woodland and poor grassland of Central and Southern Europe. Fungal diversity in ten O. tridentata adult individuals collected in two protected areas of Central Italy was analysed by means of morphological and molecular methods. Sequencing of the cloned ITS fungal inserts corresponding to the dominant PCR products obtained from amplification of total root DNA with ITS1F and ITS4 primers revealed a variety of fungal species occurring in O. tridentata roots. Among them, members of the basidiomycete families Ceratobasidiaceae, Tulasnellaceae and Hymenogastraceae were recovered, together with ascomycetes belonging to Leptodontidium and Terfezia. The implications of these results in the understanding of O. tridentata biology and for the conservation of this threatened orchid species are discussed.

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“…Epiphytic orchids are a particular group holding a high number of species with low occurrence and small populations with restricted distributions, a number of which are encountered in small and isolated remnants [27][28][29]. Orchids have been used as biological indicators of an ecosystem's health [30], because some species have shown a strong response to local environmental disturbances [31][32][33] and climatic disruptions [34].…”

Section: Introductionmentioning

confidence: 99%

Edge Influence on Diversity of Orchids in Andean Cloud Forests

Sánchez

Armenteras

Retana

2016

Forests

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Cloud forests harbor high levels of orchid diversity. However, due to the high fragmentation of these forests in the Andes, combined with the pressure for new agricultural land, orchid diversity is highly threatened. Despite this worrying scenario, few studies have assessed the effects of habitat loss specifically on orchid assemblages in the Andes. The aim of this study was to analyze the edge effect on orchids in cloud forest fragments of varying size. We measured forest structure, neighboring land cover and edge effect on orchid abundance, species richness and beta-diversity, by sampling assemblages along edge-to-interior transects in six different sized Andean (southwest Colombia) forest remnants. We recorded 11,127 stem-individuals of orchids in 141 species. Within the forest, edges sustained equal or more species than interior plots. Our results revealed neither patch metrics nor forest structure showed any significant association to orchid diversity at any scale. Nonetheless, from our observations in composition, the type of neighboring cover, particularly pastures, negatively influences interior species (richness and composition) in larger reserves. This might be due to the fact that some species found in interior plots tend to be confined, with sporadic appearances in regeneration forest and are very scarce or absent in pastures. Species richness differed significantly between matrix types. Our results suggest that (1) orchid diversity shows spatial variability in response to disturbances, but the response is independent from forest structure, patch size and patch geometry; (2) orchid communities are negatively affected by covers, and this pattern is reflected in reduced richness and high species turnover; (3) orchid richness edge effect across a pasture-interior gradient. Two forest management implications can be discerned from our results: (1) management strategies aiming to reduce edge effects may focus on improvement regeneration conditions around pasture lands; and (2) local scale management and conservation activities of natural forests in cloud forests will favor small reserves that harbor high levels of richness.

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A comparative analysis of decline in the distribution ranges of orchid species in Estonia and the United Kingdom

Cited by 160 publications

References 10 publications

Herbarium database of hungarian orchids I. Methodology, dataset, historical aspects and taxa

Herbarium database of hungarian orchids I. Methodology, dataset, historical aspects and taxa

Analysis of fungal diversity in Orchis tridentata Scopoli

Edge Influence on Diversity of Orchids in Andean Cloud Forests

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