The distribution and composition of vascular plant communities on Heard Island

Polar Biology ◽  
1987 ◽  
Vol 7 (3) ◽  
pp. 153-162 ◽  
Author(s):  
Jocelyne M. R. Hughes
Keyword(s):  
Plant Communities ◽  
Vascular Plant ◽  
Heard Island

Does cattle movement between forest pastures and fertilized grasslands affect the bryophyte and vascular plant communities in vulnerable forest pasture biotopes?

2015 ◽  
Vol 201 ◽  
pp. 26-42 ◽  
Author(s):  
Tuomo Takala ◽  
Jasmiina Haverinen ◽  
Eeva Kuusela ◽  
Teemu Tahvanainen ◽  
Jari Kouki
Keyword(s):  
Plant Communities ◽  
Vascular Plant ◽  
Cattle Movement

Return of the megaherbs: plant colonisation of derelict ANARE station buildings on sub-Antarctic Heard Island

Polar Record ◽  
2004 ◽  
Vol 40 (3) ◽  
pp. 235-243 ◽  
Author(s):  
J. Whinam ◽  
P.M. Selkirk ◽  
A.J. Downing ◽  
Bruce Hull
Keyword(s):  
Plant Species ◽  
Vascular Plants ◽  
Vascular Plant ◽  
Water Tank ◽  
Moss Species ◽  
Left Behind ◽  
Plant Colonisation ◽  
Vascular Plant Species ◽  
Heard Island ◽  
Antarctic Research

Buildings were constructed and artefacts left behind on sub-Antarctic Heard Island, associated with Antarctic research expeditions since 1926. Both bryophytes and vascular plants are colonising many parts of the now derelict buildings. On these structures and artefacts, the authors recorded four species of vascular plants out of the 11 that occur on Heard Island and nine species of mosses out of the 37 recorded from Heard Island. The vascular plant species most frequently recorded colonising structures and artefacts was Pringlea antiscorbutica (288 occurrences), with the area colonised varying from 0.3 cm2 to 430.0 cm2. Muelleriella crassifolia was the moss species that was most frequently recorded (14 occurrences), colonising areas from 2.1 cm2 to 12.9 cm2. The highest number of bryophyte species (seven) was recorded on the stone and cement of the ‘water tank.’ Pringlea antiscorbutica, Poa cookii, Azorella selago, Muelleriella crassifolia, Bryum dichotomum, Dicranoweisia brevipes and Schistidium apocarpum are all expected to continue to colonise the ANARE ruins, as well as areas that have become available since building removal and also possibly areas bared by further deglaciation.

Species Richness of Sclerophyll (Heathy) Plant Communities in Australia ̵2 the Influence of Overstorey Cover

1989 ◽  
Vol 37 (4) ◽  
pp. 337 ◽  
Author(s):  
RL Specht ◽  
A Specht
Keyword(s):  
Species Richness ◽  
Plant Species ◽  
Plant Communities ◽  
Unit Area ◽  
Vascular Plant ◽  
Biotic Factor ◽  
Rate Of Development ◽  
South West ◽  
Open Forest ◽  
Simultaneous Decrease

The species richness (number of vascular-plant species per unit area) of sclerophyll (heathy) plant communities is examined from south-east Queensland to south-west Western Australia. The species richness of communities of heathy open forest, heathy open scrub, dry heathland and wet heathland is consist- ently similar throughout southern Australia and decreases from dry heathland (on laterite, coastal and inland localities) to heathy open forest, heathy open scrub and wet heathland. Investigation of related microcommunities at Cooloola, Stradbroke Island, Ku-ring-gai Chase and Wilsons Promontory indicates that species richness decreases linearly as overstorey cover increases. In post-fire succession on Stradbroke Island heathy woodland and Dark Island heathland, species richness declines linearly as overstorey cover increases during the regeneration of the community. The appli- cation of limiting fertiliser to Stradbroke Island heathy woodland and Dark Island heathland increases the rate of development of overstorey cover, with a simultaneous decrease in species richness. Species richness of the understorey strata of plant communities appears to be inversely related to the rate of development of foliage projective cover in the overstorey. If an environmental or biotic factor inhibits or retards the development of overstorey cover, the understorey increases in species richness. Conversely, if any environmental or biotic factor accelerates the development of overstorey cover, the understorey species show a reduction in species richness.

Discussion on the preceding papers

1967 ◽  
Vol 252 (777) ◽  
pp. 289-294 ◽  
Keyword(s):  
Plant Communities ◽  
Growth Form ◽  
Vascular Plant ◽  
Maritime Antarctic ◽  
South Georgia ◽  
Lichen Community ◽  
Coastal Cliffs ◽  
Crustose Lichens ◽  
The Antarctic

J. E. Smith . Dr Longton’s slides of orange patches of Xanthoria lichens on Antarctic cliffs were reminiscent of coastal cliffs in temperate regions. Is this lichen community essentially maritime in the Antarctic? R. E. Longton. The Caloplaca-Xanthoria community certainly resembles the associations of orange crustose lichens of coastal cliffs in temperate regions. It is particularly well developed on coastal cliffs in many places in the Antarctic, but smaller areas occur inland, for example in the Tottanfjella, some 300 km from the sea. There are other parallels between growth form, and indeed in the genera represented, in the cryptogamic vegetation of Antarctic and temperate regions, an example being the associations of lichens and cushion mosses on montane rocks. M. W. Holdgate. To what extent does South Georgia vegetation resemble that of the Maritime Antarctic in the composition and distribution of its cryptogamic communities? To what degree could one describe the plant communities of the former as corresponding to those of the latter, but with the superimposition of a vascular plant element?

Annual dynamics and resilience in post-fire boreal understory vascular plant communities

2017 ◽  
Vol 401 ◽  
pp. 264-272 ◽  
Author(s):  
Nicola J. Day ◽  
Suzanne Carrière ◽  
Jennifer L. Baltzer
Keyword(s):  
Plant Communities ◽  
Vascular Plant

scholarly journals Determining Plant Diversity within Interconnected Natural Habitat Remnants (Ecological Network) in an Agricultural Landscape: A Matter of Sampling Design?

Diversity ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 12
Author(s):  
Francesco Liccari ◽  
Maurizia Sigura ◽  
Enrico Tordoni ◽  
Francesco Boscutti ◽  
Giovanni Bacaro
Keyword(s):  
Plant Communities ◽  
Plant Diversity ◽  
Sampling Design ◽  
Agricultural Landscape ◽  
Natural Habitat ◽  
Vascular Plant ◽  
Habitat Types ◽  
Natural Habitats ◽  
Pilot Studies ◽  
Integrated Method

In intensively used and human-modified landscapes, biodiversity is often confined to remnants of natural habitats. Thus, identifying ecological networks (ENs) necessary to connect these patches and maintain high levels of biodiversity, not only for conservation but also for the effective management of the landscape, is required. However, ENs are often defined without a clear a-priori evaluation of their biodiversity and are seldom even monitored after their establishment. The objective of this study was to determine the adequate number of replicates to effectively characterize biodiversity content of natural habitats within the nodes of an EN in north-eastern Italy, based on vascular plant diversity. Plant communities within habitat types of the EN’s nodes were sampled through a hierarchical sampling design, evaluating both species richness and compositional dissimilarity. We developed an integrated method, consisting of multivariate measures of precision (MultSE), rarefaction curves and diversity partitioning approaches, which was applied to estimate the minimum number of replicates needed to characterize plant communities within the EN, evaluating also how the proposed optimization in sampling size affected the estimations of the characteristics of habitat types and nodes of the EN. We observed that reducing the total sampled replicates by 85.5% resulted to sufficiently characterize plant diversity of the whole EN, and by 72.5% to exhaustively distinguish plant communities among habitat types. This integrated method helped to fill the gap regarding the data collection to monitor biodiversity content within existing ENs, considering temporal and economic resources. We therefore suggest the use of this quantitative approach, based on probabilistic sampling, to conduct pilot studies in the context of ENs design and monitoring, and in general for habitat monitoring.

scholarly journals The invasive herb Lupinus polyphyllus can reduce plant species richness independently of local invasion age

2021 ◽  
Author(s):  
Marju Prass ◽  
Satu Ramula ◽  
Miia Jauni ◽  
Heikki Setälä ◽  
D. Johan Kotze
Keyword(s):  
Species Richness ◽  
Plant Species ◽  
Plant Community ◽  
Plant Communities ◽  
Vascular Plant ◽  
Plant Species Richness ◽  
Ecological Impacts ◽  
Plant Community Composition ◽  
Lupinus Polyphyllus ◽  
Local Invasion

AbstractThe ecological impacts of invasive species may change or accumulate with time since local invasion, potentially inducing further changes in communities and the abiotic environment. Yet, time since invasion is rarely considered when investigating the ecological impacts of invasive non-native species. To examine the effect of time since invasion on the ecological impacts of Lupinus polyphyllus, a perennial nitrogen-fixing herb, we surveyed vascular plant communities in the presence and absence of L. polyphyllus in young, intermediate, and old semi-natural grassland sites (ca. 5, 10, 15 years representing both time since lupine invasion and plant community age). We analyzed vascular plant community composition, vascular plant species richness, and the cover of various ecological plant groups and L. polyphyllus. In contrast to our hypotheses, we found no change in the mean cover of L. polyphyllus (about 35%) with time since local invasion, and an ordination did not suggest marked changes in plant community composition. L. polyphyllus was associated with lower species richness in invaded plant communities but this effect did not change with time since invasion. Invaded plant communities were also associated with lower occurrence of generalist, oligotrophic (low-nutrient-adapted) and copiotrophic (nutrient-demanding) species but no temporal dynamics were detected. We conclude that even the intermediate cover of L. polyphyllus can reduce plant species richness, but the ecological impact caused by this invader might not dramatically change or accumulate with time since invasion.

scholarly journals Combining Aggregated and Dispersed Tree Retention Harvesting for Conservation of Vascular Plant Communities

2018 ◽  
Vol 99 (4) ◽  
pp. e01435
Author(s):  
Caroline M. A. Franklin ◽  
S. Ellen Macdonald ◽  
Scott E. Nielsen
Keyword(s):  
Plant Communities ◽  
Vascular Plant ◽  
Tree Retention
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