{"id":32162,"date":"2019-12-04T12:43:29","date_gmt":"2019-12-04T16:43:29","guid":{"rendered":"https:\/\/www.fondriest.com\/news\/?p=32162"},"modified":"2024-10-22T15:28:14","modified_gmt":"2024-10-22T19:28:14","slug":"river-management-on-a-changing-planet","status":"publish","type":"post","link":"https:\/\/www.fondriest.com\/news\/river-management-on-a-changing-planet.htm","title":{"rendered":"River Management On a Changing Planet"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">River management is inherently complex, demanding mastery of constantly dynamic conditions even when the climate is stable. As the climate changes, however, river management will become even more difficult and unpredictable\u2014and old models and techniques are likely to fail more often.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Now, researchers from around the world are calling for attention and change to how we manage and model the rivers of the world. <\/span><a href=\"https:\/\/tonkinlab.org\/\"><span style=\"font-weight: 400;\">Dr. Jonathan Tonkin<\/span><\/a><span style=\"font-weight: 400;\">, a Rutherford Discovery Fellow at New Zealand&#8217;s <\/span><a href=\"https:\/\/canterbury.ac.nz\/\"><span style=\"font-weight: 400;\">University of Canterbury<\/span><\/a><span style=\"font-weight: 400;\">, spoke to <\/span><i><span style=\"font-weight: 400;\">EM<\/span><\/i><span style=\"font-weight: 400;\"> about why he is arguing that current tools for river management are no longer enough as even historical baseline river ecosystem conditions themselves are changing.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Dr. Tonkin began exploring the applicability of adaptive management and process-based models together in 2017.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cI was working on a DoD funded project led by Dave Lytle, Julian Olden and Dave Merritt,\u201d explains Dr. Tonkin. \u201cWe were developing the models we are calling for during that time in an effort to forecast riverine biodiversity responses to climate change. However, in 2018, I pulled in a few other people from the US and Australia to meet at the annual Society for Freshwater Sciences conference in Detroit. That&#8217;s when the full effort really kicked off.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Tonkin and his team delineate a new approach in <\/span><a href=\"https:\/\/www.nature.com\/articles\/d41586-019-01877-1\"><span style=\"font-weight: 400;\">their recent paper<\/span><\/a><span style=\"font-weight: 400;\"> that consists of two components: developing mechanistic\/process-based models that link fundamental species biology with river flow regimes, and adaptive management that adjusts the approach and management as new information is made available. The idea is to forge past simple ecosystem monitoring toward deeper insights into underlying biological mechanisms.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cThese two approaches combine well as tools for better management under high levels of uncertainty,\u201d details Dr. Tonkin. \u201cThe four next steps are really what we consider as key steps to move forward in this approach.\u201d<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">A four-step process for river management<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Dr. Tonkin and his team provide a breakdown of the four steps designed to provide a more comprehensive approach to river management in the face of uncertainty caused by climate change:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Collect data on mechanisms;<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Describe key processes in models;<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Focus management on bottlenecks; <\/span> <span style=\"font-weight: 400;\">and<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Pinpoint uncertainty.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Collecting high-quality data on mechanisms is essential to the process.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cThese data are often what restricts the development of the models we&#8217;re advocating for,\u201d Dr. Tonkin describes. \u201cIt&#8217;s much more costly and time-consuming to collect these data than it is to monitor the abundance of a population through time, for instance. But, it&#8217;s essential data to parameterize the models we are calling for.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Even the best models rely on solid data on natural mechanisms, which are required to feed into a process-based model.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cOtherwise, we have to rely on models that correlate states with states\u2014population abundance with mean annual river flow, for example,\u201d Dr. Tonkin says. \u201cThese relationships can be uncovered by a process-based model, but not vice versa. That is, mechanistic models allow us to understand how the state of a population came to be through a variety of different mechanisms.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Calling for a description of key processes in models means better articulating how riverine populations respond to widely varying hydrological conditions. \u201cThis will help have a better understanding of how species will respond to novel flow conditions, which will arrive as the climate changes,\u201d adds Dr. Tonkin.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Focusing management on bottlenecks allows managers to place their attention, effort, and budget where it is most needed.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cHere, we&#8217;re advocating for attention to be placed on key life stages, rather than simply on overall population abundance,\u201d remarks Dr. Tonkin. \u201cDemographic population models are key tools in the arsenal here.\u201d<\/span><\/p>\n<p><div id=\"attachment_32164\" style=\"width: 610px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-32164\" class=\"size-large wp-image-32164\" src=\"https:\/\/www.fondriest.com\/news\/wp-content\/uploads\/2019\/12\/river_management_1-600x399.jpg\" alt=\"\" width=\"600\" height=\"399\" srcset=\"https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/12\/river_management_1-600x399.jpg 600w, https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/12\/river_management_1-300x199.jpg 300w, https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/12\/river_management_1-768x511.jpg 768w, https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/12\/river_management_1.jpg 940w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><p id=\"caption-attachment-32164\" class=\"wp-caption-text\"><span style=\"color: #808080;\">Both classic and modern river monitoring technologies can and should be deployed with new models.(Credit: Don Becker, USGS) [Public domain]<\/span><\/p><\/div><span style=\"font-weight: 400;\">Finally, Dr. Tonkin explains that pinpointing uncertainty refers to the need to understand both how much uncertainty exists in ones&#8217; predictions, and also the source of the uncertainty.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cIn order to make decisions, like how much water to hold back or release from a dam, managers need to know the level of uncertainty associated with a particular prediction,\u201d adds Dr. Tonkin.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">One of the strengths of a process-based model is that it can in some senses be tailored to elicit the data you&#8217;re looking for, but that&#8217;s not the whole story.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cThey&#8217;re also pretty data-hungry, they require more specific information more than correlative approaches do,\u201d says Dr. Tonkin. \u201cHowever, they don&#8217;t necessarily need the long time-series data that is necessary for a robust, statistically-driven approach. There are hybrid approaches that can estimate processes from time-series data.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">However, the team hopes to emphasize the true strength of process-based approaches: their ability to help scientists and managers see beyond conditions that they have observed in the past. This will enable better forecasting of the effects of flow regimes\u2014even those that are entirely novel, such as those produced by climate change or dam operations.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The use of this multi-pronged approach also allows for better tracking power.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cBy combining multiple processes\/mechanisms, predictions are not limited to the emergent states that they combine to predict,\u201d explains Dr. Tonkin. \u201cThe mechanisms can be tracked as well. For instance, it is possible to identify the mechanisms driving collapse of a population, such as increased flood-induced mortality or decreased recruitment of new individuals.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Finally, sensitivity analyses allow researchers to identify the information that is lacking on the biology of species, which may be leading to poor predictive performance. Faster access to more sensitive data that fuels more accurate models, ideally, means responding to ecological tipping points and bottlenecks more rapidly\u2014critical times for every ecosystem.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cTipping points are important simply due to the fact that they can lead to a complete change (collapse) in the state of a system\/population\/community etc. in response to a minor change in the environment,\u201d remarks Dr. Tonkin. \u201cFor instance, moving from one major flood every five years to one every six years may be enough to lead to population collapse of a riparian plant.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Bottlenecks hold just as much significance, and both of these issues are better understood with process-based models.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cBottlenecks are important as a single stage of a species&#8217; life cycle may be the limiting element to their persistence,\u201d Dr. Tonkin says. \u201cFor instance, it may be the egg stage that is most vulnerable to droughts, so effort should be placed on altering flows to improve egg survival.\u201d<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Adaptive river management and embracing uncertainty<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Adaptive management succeeds in that it embraces the change that is coming and helps stakeholders <\/span><i><span style=\"font-weight: 400;\">learn by doing<\/span><\/i><span style=\"font-weight: 400;\"> to establish better management goals. There are so many types of uncertainty to quantify, but over time, scientists can work to iteratively reduce uncertainty in both their data and models.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cAdaptive management is a tool we use in situations where uncertainty is really high,\u201d remarks Dr. Tonkin. \u201cClimate change is producing novel environmental conditions, so by default, the uncertainty is high\u2014there&#8217;s no historical context to base decisions on. Rather than taking uncertainty out of the process, adaptive management is a tool to use that embraces uncertainty. Our argument is that process-based models can be used to reduce uncertainty for decision-makers by providing robust forecasts into novel conditions. So the two approaches can be combined for the best results.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Obviously, too, a process-based model using the best quality data available provides a future-facing approach.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cClimate change is amplifying the pressures on river ecosystems already imposed by urbanization, invasive species, pollution and more,\u201d remarks Dr. Tonkin. \u201cThis is leading to a rapid loss of freshwater biodiversity (see http:\/\/www.livingplanetindex.org). We need to adopt modeling and management tools that embrace uncertainty and look to the future rather than looking to the past. Free-flowing, healthy, functioning rivers are truly a thing of beauty! The diversity of life they support is immense. The free services they provide to humanity are priceless. We must do all we can to protect them.\u201d<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p> A new approach to modeling and river management that embraces change for a warming world.<\/p>\n","protected":false},"author":31,"featured_media":32165,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,8,49],"tags":[157,60,2031,109,2036,2034,2032,2029,2035,2033,2030],"class_list":["post-32162","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-featured-articles","category-newsfeed","category-rivers-streams","tag-climate-change","tag-featured","tag-jonathan-tonkin","tag-news-ticker","tag-populations","tag-process-based-models","tag-river-ecosystems","tag-river-management","tag-river-models","tag-society-for-freshwater-sciences","tag-university-of-canterbury"],"remote_post_permalink":false,"remote_post_featured_image":false,"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>River Management On a Changing Planet<\/title>\n<meta name=\"description\" content=\"A new approach to modeling and river management that embraces change for a warming world.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fondriest.com\/news\/river-management-on-a-changing-planet.htm\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"River Management On a Changing Planet\" \/>\n<meta property=\"og:description\" content=\"A new approach to modeling and river management that embraces change for a warming world.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fondriest.com\/news\/river-management-on-a-changing-planet.htm\" \/>\n<meta property=\"og:site_name\" content=\"Environmental Monitor\" \/>\n<meta property=\"article:published_time\" content=\"2019-12-04T16:43:29+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-10-22T19:28:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fondriest.com\/news\/wp-content\/uploads\/2019\/12\/River_management.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"940\" \/>\n\t<meta property=\"og:image:height\" content=\"638\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Karla Lant\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Karla Lant\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.fondriest.com\\\/news\\\/river-management-on-a-changing-planet.htm#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fondriest.com\\\/news\\\/river-management-on-a-changing-planet.htm\"},\"author\":{\"name\":\"Karla Lant\",\"@id\":\"https:\\\/\\\/www.fondriest.com\\\/news\\\/#\\\/schema\\\/person\\\/51170f7bfa3a05b94cea6f517ce4e79b\"},\"headline\":\"River Management On a Changing Planet\",\"datePublished\":\"2019-12-04T16:43:29+00:00\",\"dateModified\":\"2024-10-22T19:28:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.fondriest.com\\\/news\\\/river-management-on-a-changing-planet.htm\"},\"wordCount\":1325,\"commentCount\":2,\"image\":{\"@id\":\"https:\\\/\\\/www.fondriest.com\\\/news\\\/river-management-on-a-changing-planet.htm#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/news.fondriest.com\\\/wp-content\\\/uploads\\\/2019\\\/12\\\/River_management.jpg\",\"keywords\":[\"climate change\",\"featured\",\"Jonathan Tonkin\",\"news ticker\",\"populations\",\"process-based models\",\"river ecosystems\",\"River management\",\"river models\",\"Society for Freshwater Sciences\",\"University of Canterbury\"],\"articleSection\":[\"Featured Articles\",\"Newsfeed\",\"Rivers &amp; 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