Demography and life history of three sympatric species of Botrychium subg. Botrychium in Waterton Lakes National Park, Alberta

1996 ◽  
Vol 74 (4) ◽  
pp. 538-543 ◽  
Author(s):  
Peter Lesica ◽  
Kathleen Ahlenslager
Keyword(s):  
Life History ◽  
National Park ◽  
Natural Disturbance ◽  
Sympatric Species ◽  
Rare Plants ◽  
Permanent Plots ◽  
Population Sizes ◽  
Waterton Lakes National Park ◽  
Disturbed Habitats ◽  
Prolonged Dormancy

We followed the fate of mapped sporophytes of Botrychium paradoxum, Botrychium hesperium, and their hybrid Botrychium × watertonense in permanent plots for 6 years in Waterton Lakes National Park, Alberta. All three species had half-lives of approximately 3 years or less. Botrychium paradoxum had higher rates of recruitment and mortality leading to less stable population sizes than B. hesperium, perhaps contributing to the former's relative rarity. All species demonstrated prolonged dormancy whereby plants remain below ground for 1 or more years before reappearing. Surveys and monitoring studies for these and probably other species of Botrychium are more difficult owing to prolonged dormancy. Short lifespan and association with disturbed habitats suggests that these ferns may require natural disturbance regimes for long-term persistence. Keywords: Botrychium, demography, life history, rare plants, prolonged dormancy, Waterton Lakes National Park.

Prolonged dormancy in the geophyte Allium amplectens on Vancouver Island

Botany ◽  
2011 ◽  
Vol 89 (11) ◽  
pp. 737-744 ◽  
Author(s):  
Allan R. Hawryzki ◽  
Geraldine A. Allen ◽  
Joseph A. Antos
Keyword(s):  
Life History ◽  
Plant Density ◽  
Vancouver Island ◽  
Life History Trait ◽  
Permanent Plots ◽  
Dormant Period ◽  
Fluctuating Resources ◽  
Taxonomic Groups ◽  
Prolonged Dormancy ◽  
Important Life History Trait

Prolonged dormancy occurs when a plant fails to appear above ground during the growing season. Although it may be an important life history trait of many geophytes, studies focusing on prolonged dormancy are infrequent and are concentrated on the Orchidaceae even though the phenomenon occurs in many taxonomic groups. We tracked individual plants of Allium amplectens (Amaryllidaceae) in permanent plots on Vancouver Island, which allowed us to determine rates of prolonged dormancy during a 4-year period. Dormancy rates per year averaged 38% and differed substantially among years. Over 70% of plants had a dormant period during the study. Dormancy periods of 2 years were almost as frequent as 1-year periods, and 8% of plants were dormant for 3 years. Plant density, which included small plants that we could not track in the plots, varied much more among years than did dormancy of tracked plants, suggesting that small plants may be especially prone to dormancy. High rates of prolonged dormancy and frequent multiyear dormancy indicate that this is an important life history feature of A. amplectens. We suggest that prolonged dormancy contributes to the ability of this species, and probably other species, to persist in dry habitats with fluctuating resources.

Stanowiska Succisella inflexa (Dipsacaceae) w Kampinoskim Parku Narodowym.

2019 ◽  
pp. 215-222
Author(s):  
Karol Torzewski
Keyword(s):  
National Park ◽  
Field Research ◽  
Population Sizes ◽  
Young Forests

The paper presents the results of field research on the occurrence of Succisella inflexa in Kampinos National Park, conducted in 2004–2015. Its stations are characterized and its distribution is given. The populations were mainly concentrated in the eastern part of the park. Forty-five stations have been reported, two of them most likely historical. They were most often in open sedge and meadow, and less frequently in thin shrub and young forests. The population sizes ranged from single specimens to many thousands.

scholarly journals Estimating population sizes of lions Panthera leo and spotted hyaenas Crocuta crocuta in Uganda's savannah parks, using lure count methods

Oryx ◽  
2013 ◽  
Vol 48 (3) ◽  
pp. 394-401 ◽  
Author(s):  
Edward Okot Omoya ◽  
Tutilo Mudumba ◽  
Stephen T. Buckland ◽  
Paul Mulondo ◽  
Andrew J. Plumptre
Keyword(s):  
National Parks ◽  
Protected Area ◽  
National Park ◽  
Crocuta Crocuta ◽  
Panthera Leo ◽  
Analysis Method ◽  
Conservation Areas ◽  
Conservation Area ◽  
Population Sizes

AbstractDespite > 60 years of conservation in Uganda's national parks the populations of lions and spotted hyaenas in these areas have never been estimated using a census method. Estimates for some sites have been extrapolated to other protected areas and educated guesses have been made but there has been nothing more definitive. We used a lure count analysis method of call-up counts to estimate populations of the lion Panthera leo and spotted hyaena Crocuta crocuta in the parks where reasonable numbers of these species exist: Queen Elizabeth Protected Area, Murchison Falls Conservation Area and Kidepo Valley National Park. We estimated a total of 408 lions and 324 hyaenas for these three conservation areas. It is unlikely that other conservation areas in Uganda host > 10 lions or > 40 hyaenas. The Queen Elizabeth Protected Area had the largest populations of lions and hyaenas: 140 and 211, respectively. It is estimated that lion numbers have declined by 30% in this protected area since the late 1990s and there are increasing concerns for the long-term viability of both species in Uganda.

scholarly journals Macromycetes of oak-hornbeam forests in the Białowieża National Park - monitoring studies

2014 ◽  
Vol 33 (2) ◽  
pp. 171-189 ◽  
Author(s):  
Alina Skirgiełło
Keyword(s):  
International Cooperation ◽  
Mycorrhizal Fungi ◽  
National Park ◽  
Permanent Plots ◽  
Oak Forests ◽  
Ecological Groups ◽  
Plant Association ◽  
Multiple Signals ◽  
Białowieża National Park ◽  
European Oak

Mycosociological observations were carried out between 1994-1996 on permanent plots within a <i>Tilio-Carpinetum</i> association in the Białowieża National Park. The project was carried out with international cooperation within the "Mycological monitoring in European oak forests" programme which was a result of multiple signals concerning the disappearance of oaks in our continent. Almost 40 years before mycosociological research in the same plant association and at the same plots were carried out. Studies were mainly concerned with analysing the terrestrial macromycetes, predominantly <i>Boletales</i> and <i>Agaricales</i>. They analysed the occurrence of saprotrophic and mycorrhizal fungi. Totaly 215 species from the above listed ecological groups, but there were only 34 species common to both studies. Dominating species within the mycorrhizal group were found.

Phasmarhabditis quinamensis sp. n. (Nematoda: Rhabditidae) from tropical terrestrial gastropods in southern Vietnam

Nematology ◽  
2021 ◽  
pp. 1-15
Author(s):  
Elena S. Ivanova ◽  
Sergei E. Spiridonov
Keyword(s):  
Molecular Analysis ◽  
National Park ◽  
Sympatric Species ◽  
Lsu Rdna ◽  
Nominal Species ◽  
Genital Papilla ◽  
Gastropod Species ◽  
Southern Vietnam ◽  
Males And Females ◽  
Cat Tien National Park

Summary Phasmarhabditis quinamensis sp. n. was recovered from several tropical terrestrial gastropod species collected in Cat Tien National Park in southern Vietnam with the snail, Sesara sp., designated as the type host. Phasmarhabditis quinamensis sp. n. is recognised by males and females with a lip region set off by the circle of six triangular low probolae, three bilobed, separated lips, stoma nearly as wide as long, the first genital papilla in males not incorporated into the bursa, the ensheathed dauer juveniles more than 1 mm long and with two circles of papillae at the head end and prominent amphidial apertures, a long filamentous tail and, when exsheathed, with a short, conical tail ending with two tiny spikes. The head structure of P. quinamensis sp. n. differentiates it from all nominal species of Phasmarhabditis. Phasmarhabditis quinamensis sp. n. is the second species of the genus found in Cat Tien National Park. The sympatric species P. meridionalis was also found during the present study. Phylogenetically, both species belong to different lineages within Phasmarhabditis. The molecular analysis based on partial sequences of LSU rDNA, and ITS rDNA regions showed P. kenyaensis to be the closest species to P. quinamensis sp. n.

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