“…Toward this aim, we require accurate and continuous observations of plant phenology (e.g., flowering, leaf flush, leaf coloring, and leaf fall), which serve as proxies of the responses of organisms and ecosystems to the environment (Tang et al, 2016;Piao et al, 2019), and of land-cover and land-use change. Data on plant phenology, and land-cover and land-use change help to explain the spatiotemporal variability of ecosystem properties (e.g., photosynthesis and evapotranspiration, carbon stocks and flows, the land surface's albedo, and energy balances; Penþuelas et al, 2009;Kumagai et al, 2013;Richardson et al, 2013;Wu et al, 2016), emission of biogenic volatile organic compounds (BVOCs; Penþuelas et al, 2009;Richardson et al, 2013;IPCC, 2021), cultural ecosystem services (e.g., festivals and recreation opportunities; Sakurai et al, 2011;Sparks, 2014;Nagai et al, 2019), regulating ecosystem services (e.g., pollinator abundances and pollination; Lautenbach et al, 2012;Rohde and Pilliod, 2021), environmental changes in various habitats (Muraoka et al, 2012;Gray and Ewers, 2021), and biodiversity conservation (Morisette et al, 2009;Secades et al, 2014;Morellato et al, 2016). Phenological mismatch between plants and their animal pollinators and consumers caused by the changes of the timing of each phenology due to climate change, reduces the biodiversity (Visser and Gienapp, 2019; Secretariat of the Convention on Biological Diversity, 2020).…”