Fire as an Ecological Factor

Rundel, Philip W.

doi:10.1007/978-3-642-68090-8_17

Cited by 75 publications

(48 citation statements)

References 115 publications

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“…One study of a burned matorral site revealed very little cover by native annual species and no seedling regeneration by the shrub flora, with the one exception of Trevoa trinervis (Rhamnaceae) (S. Keeley and Johnson 1977). Herbaceous perennials in Liliaceae, Amaryllidaceae, Alstroemeriaceae, and Iridaceae are common components of unburned matorral (Rundel 1981) and are present as resprouts after fire.…”

Section: Disturbance-free Recruitmentmentioning

confidence: 99%

Seed-Germination Patterns in Fire-Prone Mediterranean-Climate Regions

Keeley¹

1995

Ecological Studies

102

103

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Section: Disturbance-free Recruitmentmentioning

confidence: 99%

Seed-Germination Patterns in Fire-Prone Mediterranean-Climate Regions

Keeley¹

1995

Ecological Studies

102

103

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“…The following hypotheses have been proposed to account for the functional signi®cance of storage: (1) support of vegetative regrowth following dormancy (Ho and Rees 1976;Bradbury and Hofstra 1977;Menke and Trlica 1981), (2) support of sexual (Mooney and Hays 1973;Tissue and Nobel 1990) or vegetative (Wijesinghe and Wigham 1997) reproduction during the absence or shortage of photosynthesis, (3) recovery from herbivory (Danckwerts 1993; Van der Heyden and Stock 1996), (4) survival during dormant periods (Boyce and Volenec 1992), and (5) survival under shading (Kobe 1997). Additionally, stored carbohydrates may enable survival of habitat-speci®c disturbances, such as ®re (Rundel 1981;Miyanishi and Kellman 1986) or¯ooding (Laan and Blom 1990;Clevering et al 1995).…”

Section: Introductionmentioning

confidence: 99%

Carbohydrate storage and use in an alpine population of the perennial herb, Oxytropis sericea

Wyka¹

1999

Oecologia

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I tested hypotheses for ecological roles of storage carbohydrates in perennating organs (roots and branches) of alpine Oxytropis sericea, a leguminous herb. In naturally growing plants, total nonstructural carbohydrates achieved their maximal concentration in the fall, declined during winter, and reached minimal levels immediately after growth initiation in the spring. Experimental manipulation of carbon sink-source relations through shading of leaves of reproductive plants revealed that the normally unused portion of these carbohydrates is largely available for withdrawal. In another experiment, plants subjected to carbohydrate depletion through shading suffered decreased leaf growth after winter dormancy and had a lower probability of flowering and decreased inflorescence biomass. The dependence of reproductive growth on stored carbohydrates, however, was limited to its initial stages, because accumulation of storage carbohydrates occurred simultaneously with inflorescence expansion, flowering, and fruiting. Moreover, the whole-plant photosynthetic rate, estimated from gas exchange measurements also peaked at the time of inflorescence growth. To address whether stored reserves allow compensatory regrowth following defoliation, plants were subjected to experimental removal of leaves and inflorescences. Defoliated O. sericea partly regrew the lost leaves but withdrawal of stored carbohydrates was limited. Similarly, in a second defoliation experiment where infructescences were left intact, the plants used little stored carbohydrate and only partly compensated for fruit growth. However, carbohydrate accumulation was negatively affected by defoliation. While the ecological importance of stored nonstructural carbohydrates cannot be attributed to any function in isolation, winter respiration, leaf regrowth after winter, and early reproductive growth in O. sericea all depend to a significant extent on stored reserves. Maintaining a large storage pool may protect these functions in years when carbon status is less favorable than during this study.

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“…Fire is a major ecological factor in many biomes of the world (Rundel 1981). In the Mediterranean ecosystems fire acts as an integral part of their evolutionary history, having shaped their adaptive traits (Naveh 1975).…”

Section: Introductionmentioning

confidence: 99%

“…Post-fire seed germination is an adaptation of the species which form permanent soil seed banks of hard-coated seeds (Cistaceae, Leguminosae) and of those with a canopy seed bank (Proteaceae, Pinaceae). Seed germination has been attributed to several factors such as mechanical rupture of the hard seed coat induced by the increased temperatures developing during fire (Arianoutsou and Margaris 1981b;review in Rundel 1981), inactivation of germination inhibitors present in the soil (Christensen and Muller 1975;Keeley and Keeley 1989), effect of charred woody stems (Keeley and Nitzberg 1984) and change in light quality (Roy and Arianoutsou 1985).…”

Section: Introductionmentioning

confidence: 99%

Aspects of Demography in Post-Fire Mediterranean Plant Communities of Greece

Αριανούτσου¹

1998

Ecological Studies

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Fire as an Ecological Factor

Cited by 75 publications

References 115 publications

Seed-Germination Patterns in Fire-Prone Mediterranean-Climate Regions

Seed-Germination Patterns in Fire-Prone Mediterranean-Climate Regions

Carbohydrate storage and use in an alpine population of the perennial herb, Oxytropis sericea

Aspects of Demography in Post-Fire Mediterranean Plant Communities of Greece

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