Error message

Deprecated function: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in Drupal\Core\Url::fromUri() (line 281 of core/lib/Drupal/Core/Url.php).

Drupal\Core\Url::fromUri() (Line: 177)
Drupal\search_api_solr\Plugin\search_api\datasource\SolrDocument->getItemUrl() (Line: 1429)
Drupal\search_api\Plugin\views\field\SearchApiNumeric->getItemUrl() (Line: 1284)
Drupal\search_api\Plugin\views\field\SearchApiNumeric->getItems() (Line: 1195)
Drupal\views\Plugin\views\field\FieldPluginBase->advancedRender() (Line: 238)
template_preprocess_views_view_field()
call_user_func_array() (Line: 261)
Drupal\Core\Theme\ThemeManager->render() (Line: 490)
Drupal\Core\Render\Renderer->doRender() (Line: 248)
Drupal\Core\Render\Renderer->render() (Line: 1796)
Drupal\views\Plugin\views\field\FieldPluginBase->theme() (Line: 769)
Drupal\views\Plugin\views\style\StylePluginBase->elementPreRenderRow()
call_user_func_array() (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 886)
Drupal\Core\Render\Renderer->doCallback() (Line: 431)
Drupal\Core\Render\Renderer->doRender() (Line: 248)
Drupal\Core\Render\Renderer->render() (Line: 708)
Drupal\views\Plugin\views\style\StylePluginBase->renderFields() (Line: 574)
Drupal\views\Plugin\views\style\StylePluginBase->renderGrouping() (Line: 462)
Drupal\views\Plugin\views\style\StylePluginBase->render() (Line: 2177)
Drupal\views\Plugin\views\display\DisplayPluginBase->render() (Line: 1593)
Drupal\views\ViewExecutable->render() (Line: 201)
Drupal\views\Plugin\views\display\Page->execute() (Line: 1690)
Drupal\views\ViewExecutable->executeDisplay() (Line: 81)
Drupal\views\Element\View::preRenderViewElement()
call_user_func_array() (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 886)
Drupal\Core\Render\Renderer->doCallback() (Line: 431)
Drupal\Core\Render\Renderer->doRender() (Line: 248)
Drupal\Core\Render\Renderer->render() (Line: 238)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 637)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 231)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare() (Line: 128)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray()
call_user_func() (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 201)
Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 138)
Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 87)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 741)
Drupal\Core\DrupalKernel->handle() (Line: 19)

Deprecated function: parse_url(): Passing null to parameter #1 ($url) of type string is deprecated in Drupal\Core\Url::fromUri() (line 284 of core/lib/Drupal/Core/Url.php).

Drupal\Core\Url::fromUri() (Line: 177)
Drupal\search_api_solr\Plugin\search_api\datasource\SolrDocument->getItemUrl() (Line: 1429)
Drupal\search_api\Plugin\views\field\SearchApiNumeric->getItemUrl() (Line: 1284)
Drupal\search_api\Plugin\views\field\SearchApiNumeric->getItems() (Line: 1195)
Drupal\views\Plugin\views\field\FieldPluginBase->advancedRender() (Line: 238)
template_preprocess_views_view_field()
call_user_func_array() (Line: 261)
Drupal\Core\Theme\ThemeManager->render() (Line: 490)
Drupal\Core\Render\Renderer->doRender() (Line: 248)
Drupal\Core\Render\Renderer->render() (Line: 1796)
Drupal\views\Plugin\views\field\FieldPluginBase->theme() (Line: 769)
Drupal\views\Plugin\views\style\StylePluginBase->elementPreRenderRow()
call_user_func_array() (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 886)
Drupal\Core\Render\Renderer->doCallback() (Line: 431)
Drupal\Core\Render\Renderer->doRender() (Line: 248)
Drupal\Core\Render\Renderer->render() (Line: 708)
Drupal\views\Plugin\views\style\StylePluginBase->renderFields() (Line: 574)
Drupal\views\Plugin\views\style\StylePluginBase->renderGrouping() (Line: 462)
Drupal\views\Plugin\views\style\StylePluginBase->render() (Line: 2177)
Drupal\views\Plugin\views\display\DisplayPluginBase->render() (Line: 1593)
Drupal\views\ViewExecutable->render() (Line: 201)
Drupal\views\Plugin\views\display\Page->execute() (Line: 1690)
Drupal\views\ViewExecutable->executeDisplay() (Line: 81)
Drupal\views\Element\View::preRenderViewElement()
call_user_func_array() (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 886)
Drupal\Core\Render\Renderer->doCallback() (Line: 431)
Drupal\Core\Render\Renderer->doRender() (Line: 248)
Drupal\Core\Render\Renderer->render() (Line: 238)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 637)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 231)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare() (Line: 128)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray()
call_user_func() (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 201)
Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 138)
Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 87)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 741)
Drupal\Core\DrupalKernel->handle() (Line: 19)

Deprecated function: str_starts_with(): Passing null to parameter #1 ($haystack) of type string is deprecated in Drupal\Core\Url::fromUri() (line 289 of core/lib/Drupal/Core/Url.php).

Drupal\Core\Url::fromUri() (Line: 177)
Drupal\search_api_solr\Plugin\search_api\datasource\SolrDocument->getItemUrl() (Line: 1429)
Drupal\search_api\Plugin\views\field\SearchApiNumeric->getItemUrl() (Line: 1284)
Drupal\search_api\Plugin\views\field\SearchApiNumeric->getItems() (Line: 1195)
Drupal\views\Plugin\views\field\FieldPluginBase->advancedRender() (Line: 238)
template_preprocess_views_view_field()
call_user_func_array() (Line: 261)
Drupal\Core\Theme\ThemeManager->render() (Line: 490)
Drupal\Core\Render\Renderer->doRender() (Line: 248)
Drupal\Core\Render\Renderer->render() (Line: 1796)
Drupal\views\Plugin\views\field\FieldPluginBase->theme() (Line: 769)
Drupal\views\Plugin\views\style\StylePluginBase->elementPreRenderRow()
call_user_func_array() (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 886)
Drupal\Core\Render\Renderer->doCallback() (Line: 431)
Drupal\Core\Render\Renderer->doRender() (Line: 248)
Drupal\Core\Render\Renderer->render() (Line: 708)
Drupal\views\Plugin\views\style\StylePluginBase->renderFields() (Line: 574)
Drupal\views\Plugin\views\style\StylePluginBase->renderGrouping() (Line: 462)
Drupal\views\Plugin\views\style\StylePluginBase->render() (Line: 2177)
Drupal\views\Plugin\views\display\DisplayPluginBase->render() (Line: 1593)
Drupal\views\ViewExecutable->render() (Line: 201)
Drupal\views\Plugin\views\display\Page->execute() (Line: 1690)
Drupal\views\ViewExecutable->executeDisplay() (Line: 81)
Drupal\views\Element\View::preRenderViewElement()
call_user_func_array() (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 886)
Drupal\Core\Render\Renderer->doCallback() (Line: 431)
Drupal\Core\Render\Renderer->doRender() (Line: 248)
Drupal\Core\Render\Renderer->render() (Line: 238)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 637)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 231)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare() (Line: 128)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray()
call_user_func() (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 201)
Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 138)
Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 87)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 741)
Drupal\Core\DrupalKernel->handle() (Line: 19)

Dr. Peter J. Dillon

Newcastle, Ontario, Canada

Order of Canada

Member of the Order of Canada
Awarded on: 2018-05-11
Invested on: 2019-03-14
Peter J. Dillon, C.M. Peterborough, Ontario Peter Dillon is a passionate steward of Canada’s inland waters. A professor at Trent University and former director of the renowned Dorset Research Centre, he has conducted seminal research on the effects of human activities and natural factors, including the importance of watersheds, on lake ecosystems. His pioneering studies on excess nutrient buildup and acid deposition have influenced the development of management policies for water bodies in Canada and abroad. An experienced mentor, he has nurtured the careers of many emerging scientists.

The Governor General of Canada

Her Excellency the Right Honourable Louise Arbour

The Governor General of Canada

Error message

Dr. Peter J. Dillon

Order of Canada

Member of the Order of Canada