Local-scale disturbances can benefit an endangered, fire-adapted plant species in Western Mediterranean heathlands in the absence of fire

Paniw, Maria; Salguero‐Gómez, Roberto; Ojeda, Fernando

doi:10.1016/j.biocon.2015.04.010

Cited by 19 publications

(51 citation statements)

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“…It is endemic to the southwestern Iberian Peninsula (Europe) and the Tingitanian Peninsula (Africa), where it is restricted to fire-prone Mediterranean heathlands (Müller and Deil, 2001;Correia and Freitas, 2002), or human-disturbed heathland habitats, always on highly acidic, infertile soils (Paniw et al, 2015). In nature, germination occurs in late winter and plants reach sexual maturity in the second year after germination, flowering in mid-late spring and setting seeds in midsummer (Salces-Castellano et al, 2016).…”

Section: Study Speciesmentioning

confidence: 99%

“…Drosophyllum lusitanicum (L.) Link (Drosophyllaceae) is an endangered carnivorous plant species endemic to Mediterranean heathlands of the western Iberian Peninsula and northern Morocco (Correia and Freitas, 2002;Garrido et al, 2003;Paniw et al, 2015). These Mediterranean heathlands grow on nutrient-poor, acid soils, and are regarded as a "fireadapted" vegetation type (Ojeda, 2009;Ojeda et al, 2010) in which recurrent natural wildfires have been present (at least) since the Pleistocene (Daniau et al, 2007;Keeley et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…firebreaks, road sides, vegetation clearance for afforestation and forestry practices, cattle trampling) (Paniw et al, 2015(Paniw et al, , 2017a. That apparent association of D. lusitanicum with anthropogenic disturbance indicates that seed germination in this species might not only be affected by direct fire-related cues (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…heat shock) and negative (plant leachates) signals for seed germination in this singular species are lacking. Considering the endangered status of D. lusitanicum and the increasing frequency of anthropogenic disturbances affecting the Mediterranean heathlands (Paniw et al, 2015), understanding the germination ecology of this species will potentially help develop adequate management strategies for its conservation.…”

Section: Introductionmentioning

confidence: 99%

“…As D. lusitanicum is a fireadapted species that also colonizes open patches after vegetation clearing (Correia and Freitas, 2002;Paniw et al, 2015), we predicted that heat shock would stimulate seed germination, whereas plant leachates would inhibit it without having any further toxic effect on seed viability.…”

Section: Introductionmentioning

confidence: 99%

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Heat shock and plant leachates regulate seed germination of the endangered carnivorous plant <i>Drosophyllum lusitanicum</i>

et al. 2018

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Abstract. In fire-prone ecosystems, many plant species have specialized mechanisms of seed dormancy that ensure a successful recruitment after fire. A well-documented mechanism is the germination stimulated by firerelated cues, such as heat shock and smoke. However, less is known about the role of inhibitory germination signals (e.g. allelopathy) in regulating post-fire recruitment. Plant leachates derived from the unburned vegetation can enforce dormancy by means of allelopathic compounds, acting as a signal of unfavourable (highly competitive) niche for germination in pyrophyte species. Here, we assessed the separate effects of heat shock and plant leachates on seed germination of Drosophyllum lusitanicum, an endangered carnivorous plant endemic to Mediterranean fire-prone heathlands. We performed a germination experiment in which seeds were subjected to three treatments: (1) 5 min at 100 • C, (2) watering with plant leachate, and (3) control. Germination rate and seed viability was determined after 63 days. Heat shock stimulated seed germination in D. lusitanicum while plant leachates had inhibitory germination effects without reducing seed viability. Thus, both positive and negative signals could be involved in its successful post-fire recruitment. Fire would break seed dormancy and stimulate seed germination of D. lusitanicum through high temperatures, but also by eliminating allelochemical compounds from the soil. These results help to understand the population dynamics patterns found for D. lusitanicum in natural populations, and highlight the role of fire in the ecology and conservation of this endangered species. Seed dormancy imposed by plant-derived leachates as an adaptive mechanism should be considered more in fire ecology theory.

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Section: Study Speciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Heat shock and plant leachates regulate seed germination of the endangered carnivorous plant <i>Drosophyllum lusitanicum</i>

et al. 2018

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Effects of climate change and anthropogenic modification on a disturbance‐dependent species in a large riverine system

et al. 2017

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. 2017. Effects of climate change and anthropogenic modification on a disturbance-dependent species in a large riverine system. Ecosphere 8(1):e01653. 10. 1002/ecs2.1653 Abstract. Humans have altered nearly every natural disturbance regime on the planet through climate and land-use change, and in many instances, these processes may have interacting effects. For example, projected shifts in temperature and precipitation will likely influence disturbance regimes already affected by anthropogenic fire suppression or river impoundments. Understanding how disturbance-dependent species respond to complex and interacting environmental changes is important for conservation efforts. Using field-based demographic and movement rates, we conducted a metapopulation viability analysis for piping plovers (Charadrius melodus), a threatened disturbance-dependent species, along the Missouri and Platte rivers in the Great Plains of North America. Our aim was to better understand current and projected future metapopulation dynamics given that natural disturbances (flooding or high-flow events) have been greatly reduced by river impoundments and that climate change could further alter the disturbance regime. Although metapopulation abundance has been substantially reduced under the current suppressed disturbance regime (high-flow return interval~20 yr), it could grow if the frequency of high-flow events increases as predicted under likely climate change scenarios. We found that a four-year return interval would maximize metapopulation abundance, and all subpopulations in the metapopulation would act as sources at a return interval of 15 yr or less. Regardless of disturbance frequency, the presence of even a small, stable source subpopulation buffered the metapopulation and sustained a low metapopulation extinction risk. Therefore, climate change could have positive effects in ecosystems where disturbances have been anthropogenically suppressed when climatic shifts move disturbance regimes toward more historical patterns. Furthermore, stable source populations, even if unintentionally maintained through anthropogenic activities, may be critical for the persistence of metapopulations of early-successional species under both suppressed disturbance regimes and disturbance regimes where climate change has further altered disturbance frequency or scope.

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Demographic consequences of changes in environmental periodicity

Eva

Özgül

Blumstein

et al. 2023

Ecology

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Local-scale disturbances can benefit an endangered, fire-adapted plant species in Western Mediterranean heathlands in the absence of fire

Cited by 19 publications

References 52 publications

Heat shock and plant leachates regulate seed germination of the endangered carnivorous plant <i>Drosophyllum lusitanicum</i>

Heat shock and plant leachates regulate seed germination of the endangered carnivorous plant <i>Drosophyllum lusitanicum</i>

Effects of climate change and anthropogenic modification on a disturbance‐dependent species in a large riverine system

Demographic consequences of changes in environmental periodicity

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Local-scale disturbances can benefit an endangered, fire-adapted plant species in Western Mediterranean heathlands in the absence of fire

Cited by 19 publications

References 52 publications

Heat shock and plant leachates regulate seed germination of the endangered carnivorous plant &lt;i&gt;Drosophyllum lusitanicum&lt;/i&gt;

Heat shock and plant leachates regulate seed germination of the endangered carnivorous plant &lt;i&gt;Drosophyllum lusitanicum&lt;/i&gt;

Effects of climate change and anthropogenic modification on a disturbance‐dependent species in a large riverine system

Demographic consequences of changes in environmental periodicity

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Product

Resources

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Heat shock and plant leachates regulate seed germination of the endangered carnivorous plant <i>Drosophyllum lusitanicum</i>

Heat shock and plant leachates regulate seed germination of the endangered carnivorous plant <i>Drosophyllum lusitanicum</i>