Habitat type and dispersal mode underlie the capacity for plant migration across an intermittent seaway

Worth, James R. P.; Holland, Barbara R.; Beeton, Nicholas J.; Schönfeld, Barbara; Rossetto, Maurizio; Vaillancourt, René E.; Jordan, Gregory J.

doi:10.1093/aob/mcx086

Cited by 17 publications

(23 citation statements)

References 38 publications

(51 reference statements)

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“…Non‐standard mechanisms of dispersal could assist the long‐distance dispersal of seeds from both herbaceous and woody species, via mechanisms that operate independently of seed morphology (Higgins et al, ). If seeds are dispersed over long distances, the realized spread velocity of species may depend more strongly on the availability of suitable habitat than on species' intrinsic capacity to migrate based on their dispersal and life history traits, as explored here (Worth et al, ). Possible variation among species in their establishment rates in different habitats therefore adds considerable uncertainty to our model‐based projections of spread.…”

Section: Discussionmentioning

confidence: 99%

“…Importantly, species are assumed to spread into continuously favourable habitat. Although we acknowledge that the realized spread velocity of species depends on the availability of suitable habitat as well as species' dispersal and life history traits (Jordan, ; Pachepsky & Levine, ; Worth et al, ), species‐specific habitat preferences were outside the scope of the present study. Rather, we use the model to generate a standardized measure of spread potential that compares intrinsic migration ability across diverse taxa based on readily available trait data.…”

Section: Methodsmentioning

confidence: 99%

“…Importantly, species are assumed to spread into continuously favourable habitat. Although we acknowledge that the realized spread velocity of species depends on the availability of suitable habitat as well as species' dispersal and life history traits (Jordan, 2001;Pachepsky & Levine, 2011;Worth et al, 2017), species-specific habitat preferences were outside the scope of the present study.…”

Section: Predicting Species' Spread Velocitymentioning

confidence: 99%

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Trait correlations equalize spread velocity across plant life histories

Lustenhouwer

Moran

Levine

2017

Global Ecol. Biogeogr.

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Aim Forecasting species migration with climate change and the advance of biological invasions requires a better understanding of species' relative migration capacity. Although theory predicts that species combining high fecundity and dispersal with early maturation should spread the fastest, possible correlations between these traits greatly complicate predictions of species' relative spread velocity. We asked whether the demographic and dispersal rates controlling plant population spread are correlated across species, and which observed association of these traits leads to the fastest spread. Location Worldwide. Time period Current. Major taxa studied Eighty species of herbaceous and woody plants from 35 families and 64 genera. Methods We examined the relationships between age at maturity, dispersal and fecundity for 80 plant species, ranging from annual herbs to trees. We incorporated these rates into a model predicting spread velocities, in order to estimate species' spread capacity as a function of their life history. Results Across species, age at maturity was positively associated with both dispersal and fecundity. Given that these traits have opposing effects on spread, our models predict that species widely spaced along an age‐at‐maturity gradient should spread at comparable rates. This result was driven by variation between rather than within life‐forms; the traits controlling spread were not correlated within annual herbs, perennial herbs or trees. The predicted spread velocities for these plant life‐forms overlapped considerably, although on average, trees were predicted to spread faster than herbaceous species. Main conclusions Our results suggest that very different plant life histories allow for similar rates of biological invasion or native species migration under climate change. Determining where species fall within the correlated suite of traits controlling spread might provide the most effective way to predict relative spread velocities.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Importantly, species are assumed to spread into continuously favourable habitat. Although we acknowledge that the realized spread velocity of species depends on the availability of suitable habitat as well as species' dispersal and life history traits (Jordan, 2001;Pachepsky & Levine, 2011;Worth et al, 2017), species-specific habitat preferences were outside the scope of the present study.…”

Section: Predicting Species' Spread Velocitymentioning

confidence: 99%

See 1 more Smart Citation

Trait correlations equalize spread velocity across plant life histories

Lustenhouwer

Moran

Levine

2017

Global Ecol. Biogeogr.

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“…Significance in the comparisons was identified using ANOVA and Tukey HSD post hoc tests, and the resulting significant comparisons (all had p < .001) were labelled with "***" No Sunda species was present in Tasmania. Given the intermittent land bridge connections to the mainland that would have provided opportunities to colonize, (Worth et al, 2017) their absence suggests that Sunda species expansion could be limited by the climatic conditions at higher latitudes. This is consistent with the fossil data examined by Sniderman and Jordan (2011) showing that Asian lineages are rare among microthermal floras exposed to extreme temperatures (mean annual temperatures <12°C).…”

Section: Do Latitude Elevation and Temperature Act As Selective Fimentioning

confidence: 99%

Filters of floristic exchange: How traits and climate shape the rain forest invasion of Sahul from Sunda

Yap

Rossetto

Costion

et al. 2018

Journal of Biogeography

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Aim To evaluate how biogeographical and ecological processes influenced species distributions and community assembly in a continental rain forest flora with mixed biogeographical origins. Location Continental Australia. Methods We identified 795 species with Sahul ancestry (Australian rain forest flora of Gondwanan origin) and 604 species with Sunda ancestry (rain forest plant lineages of Indo‐Malaysian origin) from a total of 1,872 free‐standing Australian woody rain forest taxa. We then compared the distribution of Sunda to Sahul species in relation to variation in species richness and phylogenetic endemism at continental scale, and local species distributions in available plot data from the Tropics (Cape York and the Australian Wet Tropics in northern Queensland) and subtropics (Nightcap‐Border Ranges, Washpool and Dorrigo, in northern New South Wales). We compared the dispersal and persistence characteristics, and key functional traits (leaf size, fruit size, wood density and maximum height at maturity) of the Sunda and Sahul components of the continental rain forest flora. The influence of climate (temperature) and local environmental (altitude) factors in driving fine‐scale distributional patterns was evaluated. Results Sunda rain forest species richness decreased with increasing latitude but maintained high levels of endemism, including in the south. Sunda species traits suggest more efficient dispersal and faster growth than Sahul lineages. Resprouting (persistence) was less evident in species with Sunda than Sahul ancestry. We show that Sunda lineage distributions were influenced by interacting environmental and climatic factors, as well as historical contingencies. Main conclusions Efficient dispersal and relatively fast growth likely facilitated the establishment and spread of Sunda lineages in Australia. However, the Sunda invasion was resisted in stable, saturated communities of Sahul lineages, and in the temperate south where climate acted as a strong filter. The results highlight the importance of integrating historical biogeography and contemporary ecological processes to study continental‐scale rain forest distribution and assembly.

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“…source or refugia) and track associated expansion patterns (Hewitt, 2004). Identifying similar genetic patterns among co-distributed species can be useful as it can identify commonalities among a range of species' attributes such as functional traits, biogeographic history, and responses to past climatic events (Manel, 2003;van der Merwe et al, 2014;Rossetto et al, 2015a;Worth et al, 2017).…”

Section: Evidence Of the Floristic Exchange Between Australia And Sundamentioning

confidence: 99%

Is the Sunda-Sahul floristic exchange ongoing? A study of distributions, functional traits, climate and landscape genomics to investigate the invasion in Australian rainforests

Yap¹

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Australian rainforests are of mixed biogeographical histories, resulting from the collision between Sahul (Australia) and Sunda shelves that led to extensive immigration of rainforest lineages with Sunda ancestry to Australia. Although comprehensive fossil records and molecular phylogenies distinguish between the Sunda and Sahul floristic elements, species distributions, functional traits or landscape dynamics have not been used to distinguish between the two elements in the Australian rainforest flora. The overall aim of this study was to investigate both Sunda and Sahul components in the Australian rainforest flora by (1) exploring their continental-wide distributional patterns and observing how functional characteristics and environmental preferences determine these patterns, (2) investigating continental-wide genomic diversities and distances of multiple species and measuring local species accumulation rates across multiple sites to observe whether past biotic exchange left detectable and consistent patterns in the rainforest flora, (3) coupling genomic data and species distribution models of lineages of known Sunda and Sahul ancestry to examine landscape-level dynamics and habitat preferences to relate to the impact of historical processes. xii Financial support No financial support was provided to fund this research.

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Habitat type and dispersal mode underlie the capacity for plant migration across an intermittent seaway

Cited by 17 publications

References 38 publications

Trait correlations equalize spread velocity across plant life histories

Trait correlations equalize spread velocity across plant life histories

Filters of floristic exchange: How traits and climate shape the rain forest invasion of Sahul from Sunda

Is the Sunda-Sahul floristic exchange ongoing? A study of distributions, functional traits, climate and landscape genomics to investigate the invasion in Australian rainforests

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