The effects of burial by sand on survival and growth of Pitcher’s thistle (Cirsium pitcheri) along lake huron

1996 ◽  
Vol 2 (1) ◽  
pp. 3-12 ◽  
Author(s):  
M. Anwar Maun ◽  
Heidi Elberling ◽  
Angelo D’Ulisse
Keyword(s):  
Lake Huron ◽  
Survival And Growth ◽  
Cirsium Pitcheri ◽  
Pitcher's Thistle

Conservation genetics of Pitcher’s thistle (Cirsium pitcheri), an endangered Great Lakes endemic

Botany ◽  
2010 ◽  
Vol 88 (3) ◽  
pp. 250-257 ◽  
Author(s):  
Martha Gauthier ◽  
Emily Crowe ◽  
Lindsey Hawke ◽  
Neil Emery ◽  
Paul Wilson ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Great Lakes ◽  
Genetic Data ◽  
Nuclear Data ◽  
Population Connectivity ◽  
Chloroplast Microsatellite ◽  
Management Plans ◽  
Low Levels ◽  
Cirsium Pitcheri ◽  
Pitcher's Thistle

Pitcher's thistle ( Cirsium pitcheri Torr. ex Eaton (Torr. & Gray)) is a Great Lakes endemic that in Canada is designated as threatened at both the provincial (Ontario) and national levels. Management plans will benefit from conservation genetic data, which can provide insight into population genetic diversity and differentiation. We obtained genetic data from nuclear and chloroplast microsatellite markers from 17 populations of C. pitcheri around the Great Lakes. The nuclear data revealed overall low levels of diversity, high levels of inbreeding, and low levels of population connectivity. The chloroplast data identified a single haplotype, which is consistent with reduced genetic diversity following postglacial colonization. The high levels of inbreeding within populations will likely pose a serious threat to populations in the short term; these have resulted from a combination of low connectivity between populations, and small and fluctuating population sizes. Future management of C. pitcheri populations should consider human-mediated dispersal of plants or seeds among sites.

Effect of juvenile steelhead (Oncorhynchus mykiss) on age-O and age-1 brown t rout (Salmo trutta) survival and growth in a sympatric nursery stream.

1995 ◽  
Vol 52 (1) ◽  
pp. 105-114 ◽  
Author(s):  
John F. Kocik ◽  
William W. Taylor
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Abiotic Factors ◽  
Substantial Effect ◽  
Lake Huron ◽  
Intraspecific Interactions ◽  
Need To Evaluate ◽  
Brown Trout Salmo Trutta ◽  
Survival And Growth ◽  
Juvenile Brown Trout

We determined that juvenile steelhead (Oncorynchus mykiss) had little effect on the survival and growth of age-0 and age-1 brown trout (Salmo trutta) in a Lake Huron tributary. Starting in 1989, we surveyed wild brown trout juveniles in two stream sections. Unfed steelhead fry were introduced into one section in May of 1990 and 1991, establishing moderate populations. Assessments continued through 1992. Steelhead had no measurable effect on juvenile brown trout abundance or survival. Steelhead did negatively influence age-0 brown trout growth, but this effect was minor compared with intraspecific interactions and abiotic factors. We attribute much of the brown trout success to their larger size. In June sampling, brown trout were typically 42% larger than steelhead, as would be common in the region. Variability in factors such as spawner-alevin interactions or climate could alter the timing of emergence or initial abundance, causing a more substantial effect on growth and, potentially, survival. Fishery managers need to evaluate these factors for the stocks in question before combining these species.

Population ecology of Cirsium pitcheri on Lake Huron sand dunes I. Impact of white-tailed deer

1996 ◽  
Vol 74 (9) ◽  
pp. 1439-1444 ◽  
Author(s):  
Tracy Phillips ◽  
M. A. Maun
Keyword(s):  
Sand Dunes ◽  
Dry Weight ◽  
The United States ◽  
Tissue Loss ◽  
Growth And Survival ◽  
Good Ability ◽  
Monocarpic Perennial ◽  
Cirsium Pitcheri ◽  
Pitcher's Thistle ◽  
Flowering Ability

Cirsium pitcheri is a monocarpic perennial endemic to the shorelines of the Great Lakes, primarily Lakes Huron and Michigan. Its populations are being reduced by anthropogenic impact and deer grazing throughout much of its range. Several of its once abundant populations at some locations have been extirpated. The species is listed as threatened and endangered in Canada and the United States, respectively. Greenhouse studies were conducted to determine the effects of simulated herbivory by white-tailed deer on the survival, growth, and compensatory ability of plants. We found mat Cirsium pitcheri possessed good ability to compensate for tissue loss. However, simulated intensive browsing resulted in significant reductions in root dry weight. Since the flowering ability of monocarpic perennials such as Cirsium pitcheri is dictated by the amount of stored root reserves, such reductions in root biomass may delay the onset of flowering, reduce overwinter survival, and affect the future growth and survival of this threatened species. Keywords: white-tailed deer, browsing, defoliation, compensation, Cirsium pitcheri, Pitcher's thistle.

Effects of a non-native biocontrol weevil, Larinus planus, and other emerging threats on populations of the federally threatened Pitcher’s thistle, Cirsium pitcheri

2012 ◽  
Vol 155 ◽  
pp. 202-211 ◽  
Author(s):  
Kayri Havens ◽  
Claudia L. Jolls ◽  
Julie E. Marik ◽  
Pati Vitt ◽  
A. Kathryn McEachern ◽  
...  
Keyword(s):  
Federally Threatened ◽  
Cirsium Pitcheri ◽  
Pitcher's Thistle ◽  
Larinus Planus

Coral husbandry for ocean futures: leveraging abiotic factors to increase survivorship, growth, and resilience in juvenile Montipora capitata

2021 ◽  
Vol 657 ◽  
pp. 123-133
Author(s):  
JR Hancock ◽  
AR Barrows ◽  
TC Roome ◽  
AS Huffmyer ◽  
SB Matsuda ◽  
...  
Keyword(s):  
Abiotic Factors ◽  
Larval Rearing ◽  
Abiotic Conditions ◽  
Montipora Capitata ◽  
Reef Restoration ◽  
Juvenile Corals ◽  
Bleaching Response ◽  
The Face ◽  
Survival And Growth ◽  
Global And Local

Reef restoration via direct outplanting of sexually propagated juvenile corals is a key strategy in preserving coral reef ecosystem function in the face of global and local stressors (e.g. ocean warming). To advance our capacity to scale and maximize the efficiency of restoration initiatives, we examined how abiotic conditions (i.e. larval rearing temperature, substrate condition, light intensity, and flow rate) interact to enhance post-settlement survival and growth of sexually propagated juvenile Montipora capitata. Larvae were reared at 3 temperatures (high: 28.9°C, ambient: 27.2°C, low: 24.5°C) for 72 h during larval development, and were subsequently settled on aragonite plugs conditioned in seawater (1 or 10 wk) and raised in different light and flow regimes. These juvenile corals underwent a natural bleaching event in Kāne‘ohe Bay, O‘ahu, Hawai‘i (USA), in summer 2019, allowing us to opportunistically measure bleaching response in addition to survivorship and growth. This study demonstrates how leveraging light and flow can increase the survivorship and growth of juvenile M. capitata. In contrast, larval preconditioning and substrate conditioning had little overall effect on survivorship, growth, or bleaching response. Importantly, there was no optimal combination of abiotic conditions that maximized survival and growth in addition to bleaching tolerances. This study highlights the ability to tailor sexual reproduction for specific restoration goals by addressing knowledge gaps and incorporating practices that could improve resilience in propagated stocks.

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