Net Photosynthesis and Respiration of Cladonia ecmocyna (Ach.) Nyl. from the Rocky Mountains and Comparison with Three Eastern Alpine Lichens

Eickmeier, William G.; Adams, Michael S.

doi:10.2307/2424135

Cited by 15 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…x 105 ergs · cm-2 • sec-1 (ca 5,000 ft-c) at optimal temperature and thallus moisture (Eickmeier and Adams 1972). Our data support the suggestion that lichen species growing in relatively sunny habitats may achieve light saturation under optimal temperature and thallus water contents at irradiances higher than comparable lichens from habitats with lower light exposures.…”

Section: Resultssupporting

confidence: 84%

“…This decline stops in the range 95-80% RWC and a steady dark respiratory rate is maintained down to 55-15% RWC, depending on the species; at this point on the RWC curve there is a steady decline to near zero dark respiration. This pattern of drying response has been reported for C. ecmocyna and C. rrmeiferina (Eickmeier andAdams 1972, Adams 1971 b) and has been shown for C. subtenuis and C. mitis in recent work ·at our laboratory. The final dark respiration rates measured for the sun-and shade-grown C. mitis in these experiments fall in the steady "plateau range" on the basis of the measured post-run RWC's.…”

Section: Resultssupporting

confidence: 84%

“…All points are the average of 3 replicates except the twice-replicated sun si~e value at 3.88 X 105ergs · cm-2sec-1. calculated from published data (Bliss andHadley 1964, Eickmeier andAdams 1972).…”

Section: Resultsmentioning

confidence: 99%

“…Stafelt (1938) reported a maximal net photosynthetic rate of 1.38 mg C0 2 • g-1 · hr-1 for a European C. sylvatica (L.) Hoffm. Various alpine and subalpine Cladonia populations have reported maximum net photosynthesis in the range 0.23-0.54 C02 • g-1 · hr-1 (Lange 1965, Bliss and Hadley 1964, Eickmeier and Adams 1972. Re-ported maximal net photosynthetic rates for temperate-region Cladonias vary from 0.53-0.56 mg C02 • g-1 · hr-1 in C. rangiferina (Adams 1971a, b) to ca 1.4-1.8 mg C0 2 • g-1 · hr-1 for C. subtenuis populations (Runde!…”

Section: Resultsmentioning

confidence: 99%

“…An open gas-analysis system was employed in this study; it is described by Eickmeier and Adams (1972). Air flow was 4.0 lpm through the gas analysis chamber; this resulted in complete chamber air replacement once every 1.6 minutes.…”

Section: Determination Of Light Intensity Levelsmentioning

confidence: 99%

See 4 more Smart Citations

Net Photosynthesis of Cladonia Mitis (Sand.) From Sun and Shade Sites on the Wisconsin Pine Barrens

Lechowicz¹,

Adams²

1973

Ecology

Self Cite

View full text Add to dashboard Cite

The lichen Cladonia mitis (Sand.) from the Wisconsin Pine Barrens showed no significant differences in the light—dependence of net photosynthesis of sun— and shade—grown mats. Maximal net photosynthesis was 1.13 mg CO_2. g(—1) (air dry weight). hr(—1) at 3.88 x 105 ergs. cm(—2). sec(—1), 22.5 plus or minus 1.0 degrees,and near optimal thallus water content; the light compensation point was 0.36 x 105 ergs. cm2. sec(—1). After dormancy was broken by wetting the sun— and shade—grown C. mitis mats had comparable initial dark respiration rates of —0.47 and —0.48 mg CO2. g(—1). hr(—1), respectively, at high thallus relative water content (ca. 90% RWC). After drying to thallus RWC in the range 62—72%, the dark respiratory rates of the sun—and shade—grown C. mitis, respectively —0.33 and —0.25 mg CO_2. g(—1). hr(—1), differ significantly. The decreases in thallus RWC over 196 plus or minus 3.7 minutes of 37% and 29% for the sun— and shade—grown C. mitis, respectively, also differed significantly. The average annual growth rate of 5.2 plus or minus 0.2 mm. yr(—1) was the same for both sun— and shade—grown C. mitis. These characteristics of sun— and shade—grown C. mitis may be an important aspect of the physiological ecology of the plants.

show abstract

Section: Resultssupporting

confidence: 84%

Section: Resultssupporting

confidence: 84%