Zuliani Mario, Haas-Desmarais Stephanie, Brussa Laura, Cunsolo Jessica, Zuliani Angela, Lortie Christopher J
Biology, York University, Toronto, Ontario, Canada.
PeerJ. 2025 Jan 21;13:e18794. doi: 10.7717/peerj.18794. eCollection 2025.
Plant responses to changes in temperature can be a key factor in predicting the presence and managing invasive plant species while conserving resident native plant species in dryland ecosystems. Climate can influence germination, establishment, and seedling biomass of both native and invasive plant species. We tested the hypothesis that common and widely distributed native and an invasive plant species in dryland ecosystems in California respond differently to increasing temperatures. To test this, we examined the effects of temperature variation on germination, establishment, and seedling biomass of three native and one invasive plant species () in independent 6 week growth trial experiments in a controlled greenhouse. Higher relative temperatures reduced the germination and establishment of the tested invasive species and two tested native species, however, biomass was not significantly affected. Specifically, germination and establishment of the invasive species and the native species was significantly reduced. This invasive species can often outcompete natives, but increasing temperature could potentially shift the balance between the germination and establishment of natives. A warming climate will likely have negative impacts on native annual plant species in California tested here because increasing temperatures can co-occur with drought. This study shows that our tested native annual plant species tested here have some resilience to relatively significant increases in temperature, and this can favor at least one native species relative to at least one highly noxious invasive plant species.
植物对温度变化的反应可能是预测干旱生态系统中入侵植物物种的存在并加以管理，同时保护本地原生植物物种的一个关键因素。气候会影响原生植物物种和入侵植物物种的萌发、定殖及幼苗生物量。我们检验了这样一个假设：加利福尼亚干旱生态系统中常见且分布广泛的原生植物物种和一种入侵植物物种对温度升高的反应有所不同。为了验证这一点，我们在可控温室中进行了为期6周的独立生长试验，研究温度变化对三种原生植物物种和一种入侵植物物种（）的萌发、定殖及幼苗生物量的影响。相对较高的温度降低了受试入侵物种和两种受试原生植物物种的萌发和定殖率，然而，生物量并未受到显著影响。具体而言，入侵物种和原生植物物种的萌发和定殖率显著降低。这种入侵物种通常会胜过原生植物，但温度升高可能会改变原生植物萌发和定殖之间的平衡。气候变暖可能会对这里测试的加利福尼亚本地一年生植物物种产生负面影响，因为温度升高可能与干旱同时发生。这项研究表明，我们在此测试的本地一年生植物物种对温度的相对显著升高具有一定的恢复力，这可能会使至少一种本地物种相对于至少一种高度有害的入侵植物物种更具优势。
