Novel ‘stratified‐meander’ technique improves survey effort of the rare Pagoda Rock Daisy growing remotely on rocky cliff edges

McCaffrey, Nic; Blick, R. A. J.; Glenn, V.; Fletcher, Andrew; Erskine, Peter D.; Osta, John van

doi:10.1111/emr.12087

Cited by 5 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Voronoi diagrams allow the prediction of how an individual area is related to interspecies competition and resource acquisition, and how individual physiomorphological patterns are related to the number of neighbors present (Bauer et al, 2004 ). Methods that allow the estimation of plant species abundance according to presence/absence usually do not include spatial information (McCaffrey et al, 2014 ), so this has potential to enhance the analysis of club moss species.…”

Section: Analyzing Subterranean Gametophyte Population Structuresmentioning

confidence: 99%

Techniques for locating and analyzing subterranean Lycopodium and Diphasiastrum gametophytes in the field

Rimgailė-Voicik

Naujalis

2022

Appl Plant Sci

View full text Add to dashboard Cite

Homosporous club mosses have an archaic life cycle, alternating two locationally, nutritionally, and physiologically independent generations. The sexual generation of club mosses—the gametophytes (or prothallia)—are among the least researched botanical subjects. The gametophytes are responsible for not only sexual reproduction, but also the determination of recruitment of the new sporophyte generation, species habitat selection, migration, and evolution. Researchers often fail to find juvenile club moss populations and thus do not discover subterranean long‐lived achlorophyllous gametophytes. To date, the gametophytes of most club moss species remain undiscovered in nature and are not scientifically documented. Almost all researchers who have previously located subterranean club moss gametophytes declared that their first find was due to luck and that subsequently the researcher's intuition plays the most important role; however, intuition and good luck are not scientific methods. In our review, we combine our knowledge with data available in the literature and discuss the following questions using a methodical approach: (1) How can we locate a subterranean club moss gametophyte population? (2) How can we extract the gametophytes? and (3) What new knowledge about club moss population development can be gained by analyzing juvenile club moss populations?

show abstract

Section: Analyzing Subterranean Gametophyte Population Structuresmentioning

confidence: 99%

Techniques for locating and analyzing subterranean Lycopodium and Diphasiastrum gametophytes in the field

Rimgailė-Voicik

Naujalis

2022

Appl Plant Sci

View full text Add to dashboard Cite

show abstract

“…To understand the distribution of different Aloe species, we surveyed a total of 28 districts in a stratified random meander survey (Huebner 2007;McCaffrey et al 2014). The respective district authorities gave their permission to conduct this study.…”

Section: Surveymentioning

confidence: 99%

“…The respective district authorities gave their permission to conduct this study. For species with a known and consistent distribution in the landscape, such as those growing along water bodies, a systematic search was conducted within that particular habitat (Bonar et al 2011;McCaffrey et al 2014).…”

Section: Surveymentioning

confidence: 99%

Conservation status revision and communities’ perceptions of 22 Aloe species in Tanzania

Abihudi¹,

Boer²,

Treydte³

2021

Pl. Ecol. Evol.

View full text Add to dashboard Cite

Background and aims – Many Aloe species are globally threatened due to overharvesting for trade and habitat destruction. CITES regulates their international trade. In Tanzania, 50% of all existing Aloe species had previously been assessed, though some of these assessments were Data Deficient. For those with sufficient data, an update is required as the rate of decline has rapidly increased over the last years. Material and methods – We estimated Area of Occupancy (AOO), Extent of Occurrence (EOO), and number of locations for 22 Tanzanian Aloe species using the Geospatial Conservation Assessment software (GeoCAT). We assessed the reasons leading to their decline based on direct field observations and community perceptions. Key results – We revised the conservation status of 22 Aloe species; two were assessed as Critically Endangered, ten as Endangered, five as Vulnerable, and five as Least Concern. We re-discovered the Critically Endangered Aloe boscawenii, which had not been seen in Tanzania for more than six decades. We propose to downgrade the endemic Aloe dorotheae, Aloe leptosiphon, and Aloe flexilifolia from Critically Endangered to a lower threat level. The community perception on Aloe species availability did not accurately reflect their categorisation based on the IUCN criteria B. We identified agricultural activities and climate change effects as the two main threats to Tanzanian Aloe species.Conclusion – We conclude that overall numbers are declining for 22 Aloe species in Tanzania, mainly due to human activities. We recommend the implementation of laws and policies to protect their natural habitats.

show abstract

A New Method for Post-introduction Risk Assessment of Biological Invasions Among Introduced Shrubs in Developing Countries

Seburanga

Bizuru

Mwavu

et al. 2015

Environmental Management

View full text Add to dashboard Cite

Risk-assessment methods are useful in collecting data that can help decision making to prevent the introduction of new species that have the potential of invading as well as in management of established taxa. Not only the complexity and unaffordability of available pre-introduction risk-assessment models make them rarely or inconsistently applied in the least-developed countries, but also there is lack of tools to assess the status of already introduced plant species. In this study, an affordable and rapid method of assessment of invasiveness among introduced plant species was developed and tested in Rwanda. This method defines three invasion stages (potential, effective, and suppressive invaders) and four levels of risk assessment: post-introduction assessment of species inherent invasive potential (Level 1), post-establishment assessment of species capacity of regeneration (Level 2), post-naturalization assessment of species range of occurrence and ability for long-distance dispersal (Level 3), and post-naturalization assessment of species ability to outcompete other plants in the community and transform the landscape (Level 4). A review of invasive species in Rwanda was developed through desk review, examination of herbarium records, and vegetation surveys. This method should be applicable in other countries that lack the means for a more conventional scientific investigation or under any circumstance where a quick and inexpensive assessment is needed. The method could be useful to environmental managers for timely intervention with strategies specific to different stages of invasion (post-introduction, post-establishment, or post-naturalization) and allocate resources accordingly.

show abstract

Novel ‘stratified‐meander’ technique improves survey effort of the rare Pagoda Rock Daisy growing remotely on rocky cliff edges

Cited by 5 publications

References 4 publications

Techniques for locating and analyzing subterranean Lycopodium and Diphasiastrum gametophytes in the field

Techniques for locating and analyzing subterranean Lycopodium and Diphasiastrum gametophytes in the field

Conservation status revision and communities’ perceptions of 22 Aloe species in Tanzania

A New Method for Post-introduction Risk Assessment of Biological Invasions Among Introduced Shrubs in Developing Countries

Contact Info

Product

Resources

About