Photosynthetic Patterns of Sonoran Desert Lichens I. Environmental Considerations and Preliminary Field Measurements

Nash, Thomas H.; Moser, Thomas J.; Bertke, Charles C.; Link, Steven O.; Sigal, Lorene L.; White, Sally L.; Fox, Cora

doi:10.1016/s0367-2530(17)31346-4

Cited by 19 publications

(10 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Crust photosynthetic activity and growth responded quickly to rain, which is the primary source of precipitation in the southwestern United States (Nash et al, 1982). In all sites, all plots showed a continuous crust cover already during the end of the first year.…”

Section: Resultsmentioning

confidence: 91%

Contrasting effects of microbiotic crusts on runoff in desert surfaces

et al. 2012

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 91%

Contrasting effects of microbiotic crusts on runoff in desert surfaces

et al. 2012

View full text Add to dashboard Cite

“…synthesis and respiration to water content may differ between xerophytic and mesophytic species. Second, desiccation-tolerant species like G. laevigata and certain lichens (Carstairs and Oechel 1978, Lechowicz and Adams 1979, Nash et al 1982a tend to adapt to the small subset of conditions under which they are active, rather than to overall microclimate. This helps to account for lack of specialization in physiological response to light and temperature.…”

Section: Patterns Of Net C02 Fluxmentioning

confidence: 99%

“…Carbon balance may significantly limit the distributions of des? iccation-tolerant pteridophytes, lichens, and peat mosses (Ried 1960, Eickmeier 1979, Kappen et al 1980, Lechowicz 1981, Nash et al 1982a, Titus et al 1983). In these plants as well as in xerophytic bryo?…”

Section: Introductionmentioning

confidence: 99%

“…We suggest that desiccation-tolerant bryophytes are rare in xeric habitats primarily because they fail to achieve positive cumulative net uptake of C0 2 in the course of repeated cycles of wetting and drying. Carbon balance may significantly limit the distributions of desiccation-tolerant pteridophytes, lichens, and peat mosses (Ried 1960, Eickmeier 1979, Kappen et al 1980, Lechowicz 1981, Nash et al 1982a, Titus et al 1983). In these plants as well as in xerophytic bryophytes (Bewley 1979), net flux of C0 2 is negative for minutes to hours after prolonged desiccation, and also when plants are hydrated at night.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Carbon Balance Limits the Microdistribution of Grimmia laevigata, a Desiccation‐Tolerant Plant

Alpert¹,

Oechel²

1985

Ecology

View full text Add to dashboard Cite

Despite their ability to tolerate long and severe drought and extreme temperature, desiccation—tolerant plants are typically excluded from the most xeric microhabitats. It was hypothesized that this is due to an inability of the plants to maintain a positive cumulative carbon balance during repeated cycles of wetting and drying under highly xeric conditions. To test this hypothesis, the response of net CO2 flux to light, temperature, plant water content, and previous desiccation were measured in the desiccation—tolerant moss Grimmia laevigata, the dominant green plant on exposed granitic boulders in the inland chaparral of San Diego County California. Patterns of net CO2 flux and results from a simple model of carbon balance were consistent with the hypothesis.

show abstract

“…Schulze and Lange 1968;Moser and Nash 1978;Moser et al 1983;Lange et al 1993;Hovenden et al 1994). Such data have also been used in conjunction with microclimate data to estimate annual CO 2 budgets (Kappen et al 1979;Nash et al 1982;Paterson et al 1983;Matthes-Sears and Nash 1985;Bruns-Strenge and Lange 1991;Lange and Bruns-Strenge 1991;Kappen et al 1995). However, even though there are some reports on annual DW yields of lichens (e.g.…”

Section: Introductionmentioning

confidence: 99%

Growth and vitality of epiphytic lichens

et al. 1997

View full text Add to dashboard Cite

Photosynthetic and respiratory CO gas exchange was measured under controlled climate conditions in the laboratory in two epiphytic lichens, Lobaria pulmonaria and Platismatia glauca, with the aim of modelling their net productivity using field microclimate data. For both, the thallus water content (WC) and the light intensity had the greatest impact on photosynthesis. L. pulmonaria had optimum net photosynthesis (NP) at WCs between 75-175% of the thallus dry weight (DW), while P. glauca required a WC of c. 85% for maximal NP without depression at higher WCs. Both species reached light compensation of NP at 5-10 µmol photons m s and were saturated at 100-150 µmol photons m s. Respiratory CO loss corresponded to 35-40% of gross photosynthesis at 85-100% WC and 15° C, in both species. Growth of the two species were followed in transplanted thalli during a 16-month period at two contrasting sites, a forest edge adjacent to a 15 year old clear-cut and within the interior of a mature Picea abies forest. At these sites, the microclimate parameters; light, temperature, relative humidity (RH) and thallus WC were also monitored. Judged from the microclimate data, the lichens were active for 13-19% of the time with thallus WC monitoring, where >60% of the active time occurred in darkness. When photosynthetically active, the edge transplants received a 2-3 times higher light dose and were active for a longer accumulated time compared to the interior transplants. The field microclimate data in conjunction with the laboratory data predicted a 4 times higher DW yield of the edge transplants compared to the interior transplants. However, the DW yield of L. pulmonaria was overestimated at the edge and underestimated for P. glauca in the interior by our model. Possible reasons for these discrepancies and the validity of using laboratory data and microclimate monitoring to predict growth rates of lichens under varying field conditions are discussed.

show abstract

Photosynthetic Patterns of Sonoran Desert Lichens I. Environmental Considerations and Preliminary Field Measurements

Cited by 19 publications

References 11 publications

Contrasting effects of microbiotic crusts on runoff in desert surfaces

Contrasting effects of microbiotic crusts on runoff in desert surfaces

Carbon Balance Limits the Microdistribution of Grimmia laevigata, a Desiccation‐Tolerant Plant

Growth and vitality of epiphytic lichens

Contact Info

Product

Resources

About