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Nicole Bison

@nicolebison.bsky.social

PhD candidate in the Michaletz Lab @UBCBotany Plant ecophysiology & spectral ecology 🌿🔬

2 Posts420 Follower276 Folgt
@pieterarnold.bsky.social · 7mo ago

Our new @conphysjournal.bsky.social paper is out now! We discuss the physiology and ecology of vulnerable early and reproductive life stages for enhancing conservation & restoration in the context of extreme heat. doi.org/10.1093/conp...

Evaluating the vulnerability of critical early life stages in plants during heat extremes

Abstract. Plants, their seeds and their gametes show remarkable resilience and responsiveness to environmental conditions. However, worsening climate chang

doi.org

UBC Science@science.ubc.ca · 7mo ago

“The heatwave had widespread ecological effects, including an almost 400% increase in wildfire activity & negatively affecting more than three-quarters of the species studied,” said UBC zoologist Dr. Diane Srivastava. @zoology.ubc.ca @srivastavalab.bsky.social www.ctvnews.ca/climate-and-...

North America’s 2021 ‘heat dome’ has caused catastropic ecological damage: study

Billions of mussels scorched and baby birds dropping from sweltering nests: North America’s 2021 heatwave caused a cascade of ecological damage, some of it catastrophic, some unexpected, a new study s...

ctvnews.ca

Belinda Medlyn@bmedlyn.bsky.social · 8mo ago

So proud! Our brilliant PhD student Camille Sicangco's new paper just out in @newphyt.bsky.social : Testing stomatal optimisation models at high temperatures nph.onlinelibrary.wiley.com/doi/10.1111/...

Weighing the options: a test of alternative stomatal optimisation models at high temperatures

Stomatal optimisation models centre upon a fundamental tradeoff for plants: opening stomata promotes carbon uptake, but closing stomata prevents water loss. However, stomatal opening can occur at hi...

nph.onlinelibrary.wiley.com

Prof Ros Gleadow FAA 💙💚@rgleadow.bsky.social · 9mo ago

'Yes, forest trees die of old age. But the warming climate is killing them faster' #ClimateEmergency #Globalwarming #trees #eucalypts #plantscience #ecology 🪴🌳🌾🌱🌡️ theconversation.com/yes-forest-t...

Yes, forest trees die of old age. But the warming climate is killing them faster

The warming climate is killing Australia’s forest trees at a faster rate. This offers a glimpse of what may lie ahead for forests globally.

theconversation.com

Martijn Slot@martijnslot.bsky.social · 11mo ago

New paper led by @bposch.bsky.social out in @newphyt.bsky.social . We reviewed evidence, mechanisms, and consequences of high temperature acclimation of leaf heat tolerance: nph.onlinelibrary.wiley.com/doi/10.1111/...

High‐temperature acclimation of photosystem II in land plants

The effect of high temperature on plant performance and survival is a topic of great interest given the ongoing rise in global heatwave frequency, duration, and intensity. The temperature at which ph....

nph.onlinelibrary.wiley.com

Science Magazine@science.org · last yr.

As the world warms, plants in natural ecosystems and agricultural settings find ways to respond to the heat. In a new special issue of Science, researchers examine how heat affects plants at multiple scales, from the molecular level to the biosphere. scim.ag/44cSw3Z

Infrared imaging shows heat levels in sun-exposed leaves of Alstonia scholaris from the Australian Wet Tropics. As climate change increases temperatures and the severity of heat waves, both natural ecosystems and agricultural plants are increasingly affected by heat. Examining heat responses at cellular, genetic, physiological, and ecosystem scales, this special issue explores how plants sense and respond to high temperatures.
Nature Plants@natplants.nature.com · last yr.

New Article: "Leaf venation network evolution across clades and scales" rdcu.be/epLNP Evolution of leaf venation networks, from fewer, corrugated veins to high vein density and smoother loops. Herbivory as a potential driver of venation architectural changes.

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Francisco Navarro-Rosales@navarrosales.bsky.social · last yr.

My first PhD paper is now published in #STOTEN! We used a long-term fire experiment and ecosystem monitoring protocol to quantify the effect of burning on the productivity, respiration and ecosystem #carbon balance of Cerrado #savanna (1/6) www.sciencedirect.com/science/arti...

The effect of fire on the carbon fluxes and productivity of Brazilian woodland savannas

The effects of altered fire regimes within open ecosystems are poorly understood and can have serious consequences on functioning and conservation acr…

sciencedirect.com

Darren Irwin (he / him)@darrenirwin.bsky.social · 2y ago

What better way to celebrate St. Patrick's Day than publishing about GREENish Warblers! (and/ or reading about them)

A photo of a greenish warbler from east Siberia, of the Phylloscopus trochiloides plumbeitarsus species / subspecies. The bird is perched on a twig, mostly facing the viewer, with head turned so that the right eye is facing the viewer. The bird is coloured shads of yellowish and olive-brown green. There is a yellowing stripe above the eye.
Darren Irwin (he / him)@darrenirwin.bsky.social · 2y ago

OK who's ready for some science? Do you like speciation? Genomics? Hybridization? Bioinformatics? Then this is for you: Published today: "The Distribution & Dispersal of Large Haploblocks in a Superspecies" Bonus interest if you like ring species and cute greenish birds: doi.org/10.1111/mec....

Four figure panels from the paper. At upper left, a map of Asia showing the breeding ranges of six subspecies of greenish warblers, five of which are in the main ring: viridanus in blue in west Siberia, ludlowi in green in the western Himalayas, trochiloides in yellow in the central and eastern Himalayas, obscuratus in orange in central China, plumbeitarsus in red in eastern Siberia. The western form nitidus in grey, is also shown. In the lower left panel is a plot of genomic PC1 vs. PC2, with each little diamond symbol representing a single bird. This shows viridanus and plumbeitarsus as very distinct, while being connected by gradual or stepwise change through the populations around the southern ring. This is also shown in the lower central panel, which plots location around the ring vs. PC1. In the right panel, genotypes at 12 different Large Haploblock Regions are shown for 257 individuals arranged in order around the ring. Distinct differences between viridanus (in blue) and plumbeitarsus (in red) are seen, with more gradual variation through the ring connecting them. A single backcross of an F1 and a plumbeitarsus is seen in the lower row of this panel.
Kali Middleby@kalimiddleby.bsky.social · 2y ago

How do tropical rainforest trees respond to warming? 🌡️🌿We experimentally warmed canopy leaves by 4°C for 8 months and found significant declines in photosynthesis and stomatal conductance, with no shift in Topt. Read the new paper, led by Kristine Crous here: shorturl.at/AVTOk

Surrounded by lush vegetation in a tropical forest canopy, three take-away containers have been customised to warm leaves continuouslyA density plot shows the distribution of observed leaf temperatures for one example species - Myristica globosa. The graph shows that warmed leaves surpass their optimum temperature far more frequently than control leaves, and are close to their critical temperature threshold