Exotic sporomorpha as indicators of potential immigrant colonists in Antarctica

Smith, R. I. Lewis

doi:10.1080/00173139109431986

Cited by 57 publications

(25 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The taxonomic determination of pollen and spores in this study agrees with previous studies for this and other locations in Antarctica [13,22], but it also reveals that botanical families widely recognized for their role as aggressive species in the competition for colonization of the available niches [23,24] are precisely those that appear in greater abundance and coincide in their distribution with the sampling sites with sustained anthropic activity. Brassicaceae and Asteraceae are the dominant botanical families in this study in terms of the number of pollen grains recorded.…”

Section: Discussionsupporting

confidence: 80%

Pollen record of disturbed topsoil as an indirect measurement of the potential risk of the introduction of non-native plants in maritime Antarctica

Fuentes‐Lillo¹,

Troncoso-Castro²,

Cuba‐Díaz³

et al. 2016

Rev. Chil. de Hist. Nat.

View full text Add to dashboard Cite

Background: This is a study of current pollen rain on soil disturbed by human use on the Fildes Peninsula, King George Island, South Shetland Islands. A sector strongly affected by human activity, an area between the Eduardo Frei Montalva Chilean Air Force (FACH) base and the Professor Julio Escudero base of the Chilean Antarctic Institute (INACH) were sampled. A less used sector associated with scientific activity and controlled tourism, Ardley Island, and an area of low human activity, the terminal moraine of the Collins glacier, were also sampled. The samples were collected in the southern summer of 2015 and kept in the Palynology and Plant Ecology Laboratory of the Los Angeles Campus of the Universidad de Concepción, Chile. Findings: The area of greatest human activity concentrated the greatest diversity (12 taxa) of pollen grains. Three taxa are considered native to the region. Non-native taxa determined for this sector in turn had the greatest invasion (INV) factor. The dominant families were Brassicaceae and Asteraceae. The results for Ardley and Collins represent the cryptogamic flora and grasses typical of the ecosystem. Conclusion: Under the current climate change scenario, the pollen rain in Antarctic soil, in addition to obeying the random patterns of its natural dispersion, could be interpreted as an indirect measurement of the potential risk of the passive transport of propagules to Antarctica mediated by human beings.

show abstract

Section: Discussionsupporting

confidence: 80%

Pollen record of disturbed topsoil as an indirect measurement of the potential risk of the introduction of non-native plants in maritime Antarctica

Fuentes‐Lillo¹,

Troncoso-Castro²,

Cuba‐Díaz³

et al. 2016

Rev. Chil. de Hist. Nat.

View full text Add to dashboard Cite

show abstract

“…whilst at the foot of a nearby ice slope where bryopliytc spores had accumulated. Smith (1991) found 90% assorted moss cover ilfter the same period, during which both sets of control plots remained unchanged. In the clocIics.…”

mentioning

confidence: 91%

“…Moreover, within this region there are few physically and microclimatically suitable habitats for colonization by the micro-organisms (Wynn-Williams 1990 n ) which are the main concern of this review. Smith (1991) discusses complementary cryptogamic immigration into this region. The islands of the sub-Antarctic (Smith & Smith 1987) and maritime Antarctic (Smith 1984, Walton 1983) have the most favourable habitats owing to their .…”

Section: Geographical Location and Environmentmentioning

confidence: 99%

Aerobiology and colonization in Antarctica — the BIOTAS Programme

Wynn‐Williams

1991

Grana

View full text Add to dashboard Cite

“…There is some evidence of continuous im− migration of sporomorphia from South America (Lewis Smith 1984;1991;1993). Exotic pollen and spores of bryophyte and lichen species have been detected on the continent (Linskens et al 1993;Kappen and Straka 1988;Marshall and Convey 1997).…”

Section: Potential Source Of Introductionmentioning

confidence: 99%

Terrestrial Antarctic ecosystems in the changing world: An overview

Chwedorzewska¹

2009

PPRes

View full text Add to dashboard Cite

Abstract:Although the Antarctic has avoided the worst effects of alien species, its future seems endangered due to increasing natural and man−made pressures. Rapid changes in three major environmental variables have occurred in the Antarctic region during the last decades. In the short term terrestrial biota are likely to benefit from reduced environmental stresses, but in the long run the colonization of the region by lower latitude species with greater competi− tive ability will become increasingly important and can lead to large−scale changes in biologi− cal composition and trophic complexity in some existing Antarctic terrestrial ecosystems. Moreover, the recent dynamic climate changes combined with human activities in the Antarc− tic region might modify the status of several alien species which have hitherto been consid− ered transient or persistent and could, therefore, become naturalized and threaten the native communities on a larger scale than today, or influence the status of naturalized species.

show abstract

Exotic sporomorpha as indicators of potential immigrant colonists in Antarctica

Cited by 57 publications

References 24 publications

Pollen record of disturbed topsoil as an indirect measurement of the potential risk of the introduction of non-native plants in maritime Antarctica

Pollen record of disturbed topsoil as an indirect measurement of the potential risk of the introduction of non-native plants in maritime Antarctica

Aerobiology and colonization in Antarctica — the BIOTAS Programme

Terrestrial Antarctic ecosystems in the changing world: An overview

Contact Info

Product

Resources

About