Inland lake and river ice are underappreciated resources threatened by climate change. Over the past 150 years, seasonal ice cover duration on Northern Hemisphere lakes and rivers has been decreasing. Ice-cover loss affects ecosystem services in various ways, but comprehensive studies evaluating the interplay between society and ice-covered lakes and rivers are lacking. For the first time, we provide quantitative evidence of the diverse ways that the loss of inland ice may reduce cultural ecosystem services.
AbstractPeople extensively use lakes and rivers covered by seasonal ice. Although ice cover duration has been declining over the past 150 years for Northern Hemisphere freshwaters, we know relatively little about how ice loss directly affects humans. Here, we synthesize the cultural ecosystem services (i.e., services that provide intangible or nonmaterial benefits) and associated benefits supported by inland ice. We also provide, for the first time, empirical examples that give quantitative evidence for a winter warming effect on a wide range of ice-related cultural ecosystem services and benefits. We show that in recent decades, warmer air temperatures delayed the opening date of winter ice roads and led to cancellations of spiritual ceremonies, outdoor ice skating races, and ice fishing tournaments. Additionally, our synthesis effort suggests unexploited data sets that allow for the use of integrative approaches to evaluate the interplay between inland ice loss and society.With the majority of the world's lakes located at higher latitudes (>45 N) in the Northern Hemisphere (Verpoorter et al. 2014), seasonal ice cover is a common phenomenon (Denfeld et al. 2018). As a result of climate change, shorter ice duration or incomplete ice cover are becoming more common around the world (Magnuson et al. 2000;Benson et al. 2012;Sharma et al. 2019). Projected trends for air temperature and snow cover in the Northern Hemisphere suggest that seasonal ice cover duration will continue to decline (Shuter et al. 2013;Yao et al. 2014;Magee and Wu 2017;Hewitt et al. 2018;Sharma et al. 2019).Such losses in lake and river ice do not occur without reducing the uses of ice cover by people. However, it appears that the cultural ecosystem services and benefits that ice