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Showing 1-40 of 77 Resources
  • Ecology, Food Webs, and the Chesapeake Bay

    Ecology, Food Webs, and the Chesapeake Bay

    Lecture

    (49 min 3 sec) A discussion of the Chesapeake Bay Watershed, its complex food web, and the challenges of conserving and restoring the bay.

  • Climate Stress and Coastal Food Webs

    Climate Stress and Coastal Food Webs

    Lecture

    (43 min 18 sec) We are in the midst of a major die-off of coastal wetlands – what is to blame?

  • Floods, Droughts, and Food Chains

    Floods, Droughts, and Food Chains

    Lecture

    (44 min 27 sec) How a river's community of herbivores and predators is affected by changes in river flow.

  • Untangling Salt Marsh Food Webs

    Untangling Salt Marsh Food Webs

    Lecture

    (45 min 16 sec) The revelation that salt marshes are controlled by top-down forces of herbivores and other consumers.

  • Trophic Cascades in Rivers

    Trophic Cascades in Rivers

    Lecture

    (44 min 27 sec) How fishes in a river ecosystem play a critical role in forming the aquascape.

  • Ecology of Rivers and Coasts—Food Webs and Human Impacts

    Ecology of Rivers and Coasts—Food Webs and Human Impacts

    Lecture

    Two leading ecologists describe the complex interactions between species and their environment in aquatic ecosystems. 

  • Student Discussion on Patterns and Processes in Ecology

    Student Discussion on Patterns and Processes in Ecology

    Lecture

    (56 min 17 sec) The 2015 Holiday Lecture discussion session.

  • The Science of Camera Traps

    The Science of Camera Traps

    Lecture

    (23 min 44 sec) A discussion of camera traps and their use in ecological research.

  • Conserving and Restoring Ecosystems

    Conserving and Restoring Ecosystems

    Lecture

    (25 min 21 sec) Two important questions in ecology are "How do we conserve ecosystems?" and  "When we try to restore damaged ecosystems, what state do we restore them to?"

  • Communities as Ecological Networks

    Communities as Ecological Networks

    Lecture

    (41 min 18 sec) Ecosystems include complex interactions between animals and plants, which can be measured experimentally and investigated using mathematical models.

  • Modeling Populations and Species Interactions

    Modeling Populations and Species Interactions

    Lecture

    (30 min 38 sec) Gorongosa National Park in Mozambique provides several examples for how to model the growth of animal populations and then check the models against actual data. 

  • How Species Coexist

    How Species Coexist

    Lecture

    (27 min 25 sec) Large herbivores in the African savanna coexist by partitioning ecological niches by time, space, and diet.

  • Patterns in Nature

    Patterns in Nature

    Lecture

    (35 min 51 sec) Regular spatial patterns abound in natural systems. Understanding how patterns arise in ecosystems provides insights into how these ecosystems function.

  • Africa's Savanna Ecosystems

    Africa's Savanna Ecosystems

    Lecture

    (24 min 56 sec) Savannas cover 20 percent of Earth’s surface and much of Africa. The patterns and processes that occur in this globally important biome illustrate core concepts in ecology.

  • Patterns and Processes in Ecology

    Patterns and Processes in Ecology

    Lecture

    What controls the numbers and distributions of animals in their environment? How do animals interact with other species? How do natural patterns arise in nature? Find out in the 2015 Holiday Lectures on Science.

  • Saving Biodiversity Discussion

    Saving Biodiversity Discussion

    Lecture

    (57 min 28 sec) A sixty-minute discussion on biodiversity.

  • Dodging Extinction

    Dodging Extinction

    Lecture

    (31 min 12 sec) What steps can be taken to avoid the sixth mass extinction?

  • Ocean Species Respond to Climate Change

    Ocean Species Respond to Climate Change

    Lecture

    (29 min 39 sec) Coral reefs, how they are threatened by climate change, and how to protect them.

  • Extreme Life of the Sea

    Extreme Life of the Sea

    Lecture

    (29 min 27 sec) The threat to biodiversity in the ocean differs from the threats on the land.

  • Rescuing Species

    Rescuing Species

    Lecture

    (29 min 1 sec) How to preserve genetic diversity that is threatened by habitat loss.

  • Humans, Biodiversity, and Habitat Loss

    Humans, Biodiversity, and Habitat Loss

    Lecture

    (33 min 4 sec) Human activities and their effects on biodiversity in the past, present, and future.

  • Learning from Past Extinctions

    Learning from Past Extinctions

    Lecture

    (29 min 6 sec) There is still time to avoid a sixth mass extinction.

  • Biodiversity in the Age of Humans

    Biodiversity in the Age of Humans

    Lecture

    Are we witnessing a sixth mass extinction? What factors threaten ecosystems on land and in the sea? What are researchers doing to try to conserve biodiversity and ecosystems?

  • Dog Genomics and Dogs as Model Organisms

    Dog Genomics and Dogs as Model Organisms

    Lecture

    (28 min 54 sec) Dr. Elinor Karlsson discusses her work with dogs as a model organism for genomic studies.

  • Genomic Medicine, Autism, and Cancer

    Genomic Medicine, Autism, and Cancer

    Lecture

    (37 min 26 sec) A student discussion with the lecturers of the 2013 Holiday Lectures on Science.

  • From Cancer Genomics to Cancer Drugs

    From Cancer Genomics to Cancer Drugs

    Lecture

    (58 min 46 sec) Genetic data from a large number of tumor types reveal commonly mutated genes and uncover connections between different types of cancer.

  • Decoding the Autism Puzzle

    Decoding the Autism Puzzle

    Lecture

    (58 min 5 sec) Over the past decade, the application of advanced DNA sequencing techniques has greatly increased our understanding of the genetic basis of autism.

  • Cancer As a Genetic Disease

    Cancer As a Genetic Disease

    Lecture

    (58 min 33 sec) Understanding that cancer is caused by mutations in genes that regulate cell proliferation has led to the development of targeted drug therapies.

  • Sizing Up the Brain Gene By Gene

    Sizing Up the Brain Gene By Gene

    Lecture

    (59 min 32 sec) Recent advances in DNA sequencing technology have led to a better understanding of the many genes that play a role in brain development.

  • Medicine in the Genomic Era

    Medicine in the Genomic Era

    Lecture

    In the 2013 Holiday Lectures on Science, leading medical researchers explain how advances in genomics are revolutionizing their work, leading to a better understanding of disease and to improved treatments.

  • Discussion with Students on The Day The Mesozoic Died Short Film

    Discussion with Students on The Day The Mesozoic Died Short Film

    Lecture

    (42 min 27 sec) Students discuss the short film after a screening at the 2012 Holiday Lectures on Science.

  • Climate Discussion with Students

    Climate Discussion with Students

    Lecture

    (58 min 23 sec) A discussion on climate change with the students attending the 2012 Holiday Lectures on Science.

  • Climate Change: How Do We Know We're Not Wrong?

    Climate Change: How Do We Know We're Not Wrong?

    Lecture

    (58 min 29 sec) Scientific evidence for global climate change is overwhelming, yet the American public remains skeptical. History provides insights into how a Cold War-era think tank became an influential source of anti-regulation sentiment.

  • Earth's Climate: Back to the Future

    Earth's Climate: Back to the Future

    Lecture

    (1 hr 27 min 59 sec) Earth has been both cooler and warmer in the past, but the change is usually gradual. The current rate of carbon dioxide increase is unprecedented in human history, and solutions to mitigate its effect on global warming are challenging to implement.

  • Building Scientific Knowledge: The Story of Plate Tectonics

    Building Scientific Knowledge: The Story of Plate Tectonics

    Lecture

    (57 min 59 sec) The theory of plate tectonics took many decades to become accepted. The process by which it was finally accepted provides a fascinating glimpse into how scientists build new scientific consensus.

  • The Deep History of a Living Planet

    The Deep History of a Living Planet

    Lecture

    (1 hr 28 min 29 sec) Microbes have been the dominant life form throughout Earth's history. Eukaryotes and animals evolved only after microbes evolved oxygen-generating photosynthesis.

  • Changing Planet: Past, Present, Future

    Changing Planet: Past, Present, Future

    Lecture

    Has Earth changed over deep time? How did Earth shape life and life shape Earth? What does Earth's climate in the distant past tell us about the future?

  • Reporting Scientific Results to the Public

    Reporting Scientific Results to the Public

    Lecture

    (1 hr 11 min 57 sec) Second discussion in the 2011 Holiday Lectures on human evolution, on how to effectively report scientific results to the general public.

  • Genetics of Bitter Taste Perception

    Genetics of Bitter Taste Perception

    Lecture

    (50 min 39 sec) How humans perceive bitter taste, and the evolution of taste perception.

  • Hominid Paleobiology

    Hominid Paleobiology

    Lecture

    (1 hr 33 min 25 sec) The hominid fossil record of the past six million years gives us surprising insights into the path of human evolution.

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