Using herbarium specimens to select indicator species for climate change monitoring

Hufft, Rebecca; DePrenger-Levin, Michelle E.; Levy, Richard; Islam, Melissa B.

doi:10.1007/s10531-018-1505-2

Cited by 17 publications

(18 citation statements)

References 47 publications

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“…Both of these studies detected similar sensitivities to temperature to that detected in S. tortuosus (−4.14 days/°C in Model 2; Table 2B). In many species, the relationship between phenology and precipitation remains unclear and can be highly species-or communityspecific (Hart et al, 2014;Munson and Sher, 2015;Rawal et al, 2015;Matthews and Mazer, 2016;Hufft et al, 2018). Similar to the pattern detected here, Matthews and Mazer (2016) found that increased precipitation delays flowering time in T. ovatum.…”

Section: Relationship Between Climate and Flowering Datesupporting

confidence: 78%

“…Across a diverse group of alpine species, Hufft et al. () also found that precipitation delayed flowering time (0.02 days/mm). Surprisingly few herbarium‐based studies have investigated the impact of precipitation on phenology.…”

Section: Discussionmentioning

confidence: 95%

“…Similar to the pattern detected here, Matthews and Mazer (2016) found that increased precipitation delays flowering time in T. ovatum. Across a diverse group of alpine species, Hufft et al (2018) also found that precipitation delayed flowering time (0.02 days/mm). Surprisingly few herbarium-based studies have investigated the impact of precipitation on phenology.…”

Section: Relationship Between Climate and Flowering Datementioning

confidence: 88%

“…In many species, the relationship between phenology and precipitation remains unclear and can be highly species‐ or community‐specific (Hart et al., ; Munson and Sher, ; Rawal et al., ; Matthews and Mazer, ; Hufft et al., ). Similar to the pattern detected here, Matthews and Mazer () found that increased precipitation delays flowering time in T. ovatum .…”

Section: Discussionmentioning

confidence: 99%

“…Studies of phenology-the timing of life cycle events-have provided some of the strongest evidence that many organisms have been or will be affected by global changes in climate (Parmesan and Yohe, 2003;Menzel et al, 2006). Plants are sensitive to changes in climate, especially changes in temperature, and plant phenology has been monitored and tracked through time using a variety of approaches, including long-term in situ observations of living plants (Sparks and Carey, 1995;Chmielewski and Rötzer, 2001;Rutishauser et al, 2009), citizen science networks (Mayer, 2010;Haggerty et al, 2013), satellite imagery (Stöckli and Vidale, 2004;Studer et al, 2007;White et al, 2009), and herbarium specimens (Lavoie and Lachance, 2006;Panchen et al, 2012;Hufft et al, 2018).…”

mentioning

confidence: 99%

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A new phenological metric for use in pheno‐climatic models: A case study using herbarium specimens of Streptanthus tortuosus

2019

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Premise Herbarium specimens have been used to detect climate‐induced shifts in flowering time by using the day of year of collection ( DOY ) as a proxy for first or peak flowering date. Variation among herbarium sheets in their phenological status, however, undermines the assumption that DOY accurately represents any particular phenophase. Ignoring this variation can reduce the explanatory power of pheno‐climatic models ( PCM s) designed to predict the effects of climate on flowering date. Methods Here we present a protocol for the phenological scoring of imaged herbarium specimens using an ImageJ plugin, and we introduce a quantitative metric of a specimen's phenological status, the phenological index ( PI ), which we use in PCM s to control for phenological variation among specimens of Streptanthus tortuosus (Brassicaceeae) when testing for the effects of climate on DOY . We demonstrate that including PI as an independent variable improves model fit. Results Including PI in PCM s increased the model R 2 relative to PCM s that excluded PI ; regression coefficients for climatic parameters, however, remained constant. Discussion Our protocol provides a simple, quantitative phenological metric for any observed plant. Including PI in PCM s increases R 2 and enables predictions of the DOY of any phenophase under any specified climatic conditions.

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Section: Relationship Between Climate and Flowering Datesupporting

confidence: 78%

Section: Discussionmentioning

confidence: 95%

Section: Relationship Between Climate and Flowering Datementioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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A new phenological metric for use in pheno‐climatic models: A case study using herbarium specimens of Streptanthus tortuosus

2019

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Region‐specific phenological sensitivities and rates of climate warming generate divergent temporal shifts in flowering date across a species' range

Love

Mazer

2021

American J of Botany

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Premise Forecasting how species will respond phenologically to future changes in climate is a major challenge. Many studies have focused on estimating species‐ and community‐wide phenological sensitivities to climate to make such predictions, but sensitivities may vary within species, which could result in divergent phenological responses to climate change. Methods We used 743 herbarium specimens of the mountain jewelflower (Streptanthus tortuosus, Brassicaceae) collected over 112 years to investigate whether individuals sampled from relatively warm vs. cool regions differ in their sensitivity to climate and whether this difference has resulted in divergent phenological shifts in response to climate warming. Results During the past century, individuals sampled from warm regions exhibited a 20‐day advancement in flowering date; individuals in cool regions showed no evidence of a shift. We evaluated two potential drivers of these divergent responses: differences between regions in (1) the degree of phenological sensitivity to climate and (2) the magnitude of climate change experienced by plants, or (3) both. Plants sampled from warm regions were more sensitive to temperature‐related variables and were subjected to a greater degree of climate warming than those from cool regions; thus our results suggest that the greater temporal shift in flowering date in warm regions is driven by both of these factors. Conclusions Our results are among the first to demonstrate that species exhibited intraspecific variation in sensitivity to climate and that this variation can contribute to divergent responses to climate change. Future studies attempting to forecast temporal shifts in phenology should consider intraspecific variation.

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Chilling consequences: Herbarium records reveal earlier reproductive phenology of winter annual gladecress in a wetter, cooler climate

Banaszak

Grinath

Herlihy

2020

Plants People Planet

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Using herbarium specimens to select indicator species for climate change monitoring

Cited by 17 publications

References 47 publications

A new phenological metric for use in pheno‐climatic models: A case study using herbarium specimens of Streptanthus tortuosus

A new phenological metric for use in pheno‐climatic models: A case study using herbarium specimens of Streptanthus tortuosus

Region‐specific phenological sensitivities and rates of climate warming generate divergent temporal shifts in flowering date across a species' range

Chilling consequences: Herbarium records reveal earlier reproductive phenology of winter annual gladecress in a wetter, cooler climate

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