Facilitating adaptation of biodiversity to climate change: a conceptual framework applied to the world’s largest Mediterranean-climate woodland

Prober, Suzanne M.; Thiele, Kevin R.; Rundel, Philip W.; Yates, Colin J.; Berry, Sandra L.; Byrne, Margaret; Christidis, Leslie; Gosper, Carl R.; Grierson, Pauline F.; Lemson, Kristina L.; Lyons, Thomas; Macfarlane, Craig; O’Connor, Michael H.; Scott, J. K.; Standish, Rachel J.; Stock, William D.; Etten, Eddie van; Wardell‐Johnson, Grant; Watson, Alexander W. T.

doi:10.1007/s10584-011-0092-y

Cited by 85 publications

(95 citation statements)

References 51 publications

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“…We did not find significant relationships of photosynthetic traits to foliar N or P despite the study area being extremely limited in supplies of both nutrients (Prober et al, 2012). warm season 26 to 37 • C), both for the data set as a whole and within individual species (Figs.…”

Section: Seasonal Variability In Leaf Nutrientsmentioning

confidence: 65%

Thermal acclimation of leaf photosynthetic traits in an evergreen woodland, consistent with the coordination hypothesis

et al. 2018

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Abstract. Ecosystem models commonly assume that key photosynthetic traits, such as carboxylation capacity measured at a standard temperature, are constant in time. The temperature responses of modelled photosynthetic or respiratory rates then depend entirely on enzyme kinetics. Optimality considerations, however, suggest this assumption may be incorrect. The "coordination hypothesis" (that Rubisco-and electron-transport-limited rates of photosynthesis are co-limiting under typical daytime conditions) predicts, instead, that carboxylation (V cmax ) capacity should acclimate so that it increases somewhat with growth temperature but less steeply than its instantaneous response, implying that V cmax when normalized to a standard temperature (e.g. 25 • C) should decline with growth temperature. With additional assumptions, similar predictions can be made for electron-transport capacity (J max ) and mitochondrial respiration in the dark (R dark ). To explore these hypotheses, photosynthetic measurements were carried out on woody species during the warm and the cool seasons in the semi-arid Great Western Woodlands, Australia, under broadly similar light environments. A consistent proportionality between V cmax and J max was found across species. V cmax , J max and R dark increased with temperature in most species, but their values standardized to 25 • C declined. The c i : c a ratio increased slightly with temperature. The leaf N : P ratio was lower in the warm season. The slopes of the relationships between log-transformed V cmax and J max and temperature were close to values predicted by the coordination hypothesis but shallower than those predicted by enzyme kinetics.

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Section: Seasonal Variability In Leaf Nutrientsmentioning

confidence: 65%

Thermal acclimation of leaf photosynthetic traits in an evergreen woodland, consistent with the coordination hypothesis

et al. 2018

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“…CC BY 4.0 License. acclimation and declining upon acclimation to warmer temperature (Reich et al, 2016). Growth temperature dependent changes in R dark at a standard temperature can occur over periods of 1-3 days (Atkin et al, 2000;Bolstad et al, 2003;Lee et al, 2005;Zaragoza-Castells et al, 2007;Armstrong et al, 2008).…”

mentioning

confidence: 99%

Thermal acclimation of leaf photosynthetic traits in an evergreen woodland, consistent with the co-ordination hypothesis

Togashi¹,

Prentice²,

Atkin³

et al. 2017

Preprint

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Abstract. Ecosystem models commonly assume that key photosynthetic traits, such as carboxylation-capacity measured at a 15 standard temperature, are constant in time. The temperature responses of modelled photosynthetic/respiratory rates then depend entirely on enzyme kinetics. Optimality considerations suggest this assumption may be incorrect. The 'co-ordination hypothesis' (that Rubisco-and electron-transport limited rates of photosynthesis are co-limiting under typical daytime conditions) predicts instead that carboxylation (V cmax ) and light-harvesting (J max ) capacities, and mitochondrial respiration in the dark (R dark ), should acclimate so that they increase with growth temperature -but less steeply than their instantaneous 20 response rates. To explore this hypothesis, photosynthetic measurements were carried out on woody species during the warm and the cool seasons in the semi-arid Great Western Woodlands, Australia, under broadly similar light environments. A consistent linear relationship between V cmax and J max was found across species. V cmax , J max and R dark increased with temperature, but values standardized to 25˚C declined. The c i :c a ratio increased slightly with temperature. The leaf N:P ratio was lower in the warm season. The slopes of the relationships of log-transformed V cmax and J max to temperature were close to 25 values predicted by the co-ordination hypothesis, but shallower than those predicted by enzyme kinetics.

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“…Present threats to biodiversity in the region include changes in fire regimes, ongoing mining operations and exploration activity, as well as introduced herbivores, carnivores and weeds (Figure 3, Watson et al, 2008). Climate change is expected to result in a general warming trend with drying from the north to south, with further impacts on rainfall and fire frequency (Prober et al, 2012). We divided the study region into 1 km 2 square planning units (162,163 in total) which we employed as sites available for management.…”

Section: Study Regionmentioning

confidence: 99%

Clear consideration of costs, condition and conservation benefits yields better planning outcomes

Evans

Tulloch

Law

et al. 2015

Biological Conservation

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The conservation benefit of a management action depends on what would have happened in absence of an intervention, and whether the conservation objective is to maintain existing biodiversity values, or to restore those that have been lost. How this benefit is calculated and considered in spatial prioritisation analyses could influence the expected cost-effectiveness of management, although this has not previously been explored. Here, we use a comprehensive decision theoretic approach to identify management priorities in a region of ecological, cultural and economic significance, the Great Western Woodlands (GWW) of south-western Australia.To demonstrate how cost, condition and conservation benefits affect prioritisation outcomes, we consider two different conservation objectives: the maintenance of native vegetation communities, and the restoration of natural fire regimes. We compare the results from (1) our comprehensive approach, to priorities identified using two alternative approaches: (2) consider generic management costs (travel, labour) and assume that landscape condition is homogenous, 2 or; (3) use landscape condition as a surrogate for the cost of management, i.e. areas in poor condition are assumed to have high costs. We demonstrate that prioritisation outcomes differ substantially depending on how the benefits and costs of a management action are calculated.Using landscape condition as a surrogate for management costs resulted in priority areas that were least cost-effective. To avoid misspent conservation funding, we argue that care must be taken to incorporate the most appropriate cost and condition metrics into spatial prioritisation analyses, and that conservation benefits must be derived from a clearly specified objective.

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Facilitating adaptation of biodiversity to climate change: a conceptual framework applied to the world’s largest Mediterranean-climate woodland

Cited by 85 publications

References 51 publications

Thermal acclimation of leaf photosynthetic traits in an evergreen woodland, consistent with the coordination hypothesis

Thermal acclimation of leaf photosynthetic traits in an evergreen woodland, consistent with the coordination hypothesis

Thermal acclimation of leaf photosynthetic traits in an evergreen woodland, consistent with the co-ordination hypothesis

Clear consideration of costs, condition and conservation benefits yields better planning outcomes

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