• The National Park Service is cataloguing plants and animals for its birthday.

    An agency of the United States Department of the Interior, the National Park Service (NPS) oversees numerous national monuments, various conservation and historical properties, and a whopping 58 national parks.

    In 2016, NPS will celebrate its 100th anniversary. For the decade leading up to that, NPS and the National Geographic Society are co-hosting a special bioblitz—a 24-hour species inventory—in a different national park each year. The first BioBlitz was held in 2007 at Rock Creek Park in Washington, D.C. That event was followed by species inventories in Santa Monica Mountains National Recreation Area in California, Indiana Dunes National Lakeshore, and Biscayne National Park near Miami, Florida. Saguaro National Park in Tucson, Arizona, was chosen as the site for 2011.

    “The hosts strive to choose parks that represent the diversity of ecosystems found across the United States and that are close to urban areas, so that scientists, school children, educators, and the public can all participate in the event,” says Sean O’Connor of National Geographic Education.

    Created in 1994, Saguaro National Park is one of NPS’s newer parks. It covers 370 square kilometers (more than 91,000 acres) in two districts that are separated by the city of Tucson. The Tucson Mountain District (Saguaro West) ranges in elevation from 664 to 1,429 meters (2,180 to 4,687 feet) and contains two distinct ecosystems. Rincon Mountain District (Saguaro East) ranges in elevation from 814 to 2,641 meters (2,670 to 8,666 feet) and contains six distinct ecosystems.

    Base camp for the BioBlitz was Saguaro West’s Red Hills Visitor Center, but BioBlitz activities took place in both districts.

    Inventory Teams

    While the park is home to an estimated 1.6 million saguaro plants—a type of cactus—many other species are represented. For BioBlitz, teams of volunteer scientists, students, educators, and community members worked together to find as many amphibians, reptiles, birds,  mammals, invertebrates, fungi, and non-vascular and vascular plants as possible.

    As many as 5,000 people attended the event, which was held from October 21 to 22. Among them were 2,000 school-age youth and their teachers, including about 75 who took multi-day hikes deep into the park.

    “It was great to see so many school children here,” said Constance Negley, a Tucson resident who volunteered because her home is on the border of Saguaro West. "The kids had fun and an informative desert experience."

    Besides the special activities for students, there were dozens of group activities focusing on everything from microbes to mule deer. The events were led by scientists, some of whom work for NPS in other parks and jumped at the chance to visit Saguaro, in the Sonoran Desert.

    “I saw this as a once-in-a-lifetime opportunity to study the Sonoran tortoise,” said Claire Crow, a wildlife biologist at Zion National Park in Utah. Located in the Mojave Desert with an elevation of more than 2,143 meters (7,000 feet), Zion is the highest place desert tortoises are found.

    Crow wanted to know if there were differences between the Sonoran and Mojave species. She learned there are.

    “In addition to some physical differences, the Sonoran tortoises do not burrow as deeply or have as many burrow chambers as the ones in Mojave,” she reported.

    Just as the focus of the inventory groups varied, so did the sampling methods. Some teams used nets and cups to capture insects.

    Some teams used sound. In Saguaro East, Tim Helentjaris led a nocturnal bird survey using a protocol developed for the Tucson Audubon Society.

    “We listen passively for about five minutes. If we haven't heard anything by then, we play short stretches of selected owl calls to see if we can get them to respond,” he said. “If they come in closer, I have a spotlight we can use to try to get a better look.”

    Other teams conducted visual encounter surveys. Taylor Edwards, a biologist from the University of Arizona, led a group looking for “herps” (amphibians and reptiles). “We are looking for different types and just want a count,” Edwards said.

    Once an animal was spotted, Edwards made note of the species, as well as location and even air temperature, on the field datasheets provided to all team leaders. “In a more detailed study, we would not only look for species that are present, but also those that are absent even though we expect to see them,” he said.

    Taking note of non-native species is also important in BioBlitz surveys. Highly flammable buffelgrass and fountain grass, native to Africa and Asia, are threats to the Sonoran Desert.

    “Fire is not part of the ecology here,” said Tom Van Devender of the Sky Island Alliance during a general plant survey. “If the bases of the saguaros or any other native plants are burned, they will die.”

    The potential damage caused by the invasive grasses is so great that a community group called the Sonoran Desert Weedwackers removes the grasses on a regular basis.

    Biodiversity at Base Camp

    While the numerous inventory teams were hard at work, the Biodiversity Festival was taking place at base camp. It featured music, dance, poetry, talks by leading scientists, live animal demonstrations, and examples of cultures indigenous to the Sonoran Desert.

    One highlight was ceremonial dances by members of the Yaqui tribe. Officially recognized by the U.S. government in 1978, the Yaqui are native to northern Mexico and southern Arizona. They are the only tribe to have special indigenous peoples’ identification cards that allow them to freely cross the U.S./Mexico border.

    The science tent at base camp was not only a hub for data collection and processing, but also featured a variety of exhibits, such as a decomposing saguaro. In addition, there were 40 interactive exhibitor booths that featured wildlife and environmental groups, such as Reptile and Amphibian Ecology International and the Sierra Club. Kids of all ages had the opportunity to participate in activities at the booths and earn course credit toward a degree in Biodiversity Science.

    “I loved all of the booths,” said Julia Shaw, a student at Arizona State University in Tempe and member of the Central Arizona Chapter of the Society for Conservation Biology. “There was a great variety and everyone was so nice.”

    Marena Sampson, also a member of the society, added, “It was really interesting to learn about different types of work being done by scientists. It helps us think about possible career paths.”

    It will take awhile to complete the entire inventory from BioBlitz 2011. Not only is there a lot of data to analyze, but some of it is not even ready yet.

    “It takes three days to a month to grow a fungus,” said Brett Baxter, a student at the University of Arizona and member of the Arnold Lab. Led by Dr. A. Elizabeth Arnold, the lab studies ecological and evolutionary aspects of fungi, and is at work cultivating and analyzing fungi from plant tissues collected at BioBlitz.

    “We expect to submit our official inventory in January,” said Baxter.

    NPS will use the final data for its records and ongoing monitoring efforts. While that is certainly beneficial, perhaps BioBlitz participants and the environment as a whole experienced the bigger benefit.

    “BioBlitzes are a fantastic way to get people out to their local parks and participating in ecological science and monitoring,” said National Geographic’s O’Connor. “It's important to engage the public and especially students and educators in this type of activity to build in them an interest and understanding of the parks, habitats, and ecosystems around them.”

    Saguaro National Park BioBlitz
    If you squeeze his tail, he grants you a wish! (Not scientifically proven.)

    Get Involved
    Dont limit your interest in biodiversity to BioBlitz.
    Help document Earths biodiversity and share wildlife encounters through Project NOAH, a technology tool supported by the National Geographic Society.
    Participate in a Junior Rangers program at a national park.
    Connect with local conservation organizations to learn about local wildlife. For example, the Tucson Audubon Society offers beginner bird walks on a regular basis.
    Volunteer with a local organization to help preserve and protect biological diversity.

  • Term Part of Speech Definition Encyclopedic Entry
    agency Noun

    organization serving the government of a country or nation. Also called a government agency.

    amphibian Noun

    an animal able to live both on land and in water.

    analyze Verb

    to study in detail.

    aspect Noun

    view or interpretation.

    beneficial Adjective

    helpful or providing benefits.

    bioblitz Noun

    a field study in which groups of scientists and citizens study and inventory all the different kinds of living organisms within a given area.

    Encyclopedic Entry: bioblitz
    biodiversity Noun

    all the different kinds of living organisms within a given area.

    Encyclopedic Entry: biodiversity
    biologist Noun

    scientist who studies living organisms.

    bird Noun

    egg-laying animal with feathers, wings, and a beak.

    border Noun

    natural or artificial line separating two pieces of land.

    Encyclopedic Entry: border
    buffelgrass Noun

    grass native to Africa and Asia.

    burrow Verb

    to dig a small hole or tunnel.

    burrow chamber Noun

    compartment within an animal's burrow, or tunnel dug for shelter. Also called a burrowing chamber.

    call Noun

    short, simple bird vocalization, such as used to raise alarm.

    city Noun

    large settlement with a high population density.

    conservation Noun

    management of a natural resource to prevent exploitation, destruction, or neglect.

    Encyclopedic Entry: conservation
    cultivate Verb

    to develop or improve a skill through labor, study, or care.

    data Plural Noun

    (singular: datum) information collected during a scientific study.

    decade Noun

    10 years.

    decompose Verb

    to decay or break down.

    distinct Adjective

    unique or identifiable.

    diversity Noun


    ecology Noun

    branch of biology that studies the relationship between living organisms and their environment.

    Encyclopedic Entry: Types of Ecology
    ecosystem Noun

    community and interactions of living and nonliving things in an area.

    Encyclopedic Entry: ecosystem
    elevation Noun

    height above or below sea level.

    Encyclopedic Entry: elevation
    evolution Noun

    change in heritable traits of a population over time.

    exhibit Noun

    display, often in a museum.

    fantastic Adjective

    excellent or very good.

    flammable Adjective

    easily set on fire.

    fountain grass Noun

    drought-tolerant grass native to Africa and Asia.

    fungi Plural Noun

    (singular: fungus) organisms that survive by decomposing and absorbing nutrients in organic material such as soil or dead organisms.

    habitat Noun

    environment where an organism lives throughout the year or for shorter periods of time.

    Encyclopedic Entry: habitat
    herp Noun

    reptile or amphibian, derived from "herpetology," the study of reptiles and amphibians.

    hike Verb

    to walk a long distance.

    indigenous Adjective

    characteristic to or of a specific place.

    Encyclopedic Entry: indigenous
    invertebrate Noun

    animal without a spine.

    mammal Noun

    animal with hair that gives birth to live offspring. Female mammals produce milk to feed their offspring.

    microbe Noun

    tiny organism, usually a bacterium.

    monitor Verb

    to observe and record behavior or data.

    mule deer Noun

    large deer (mammal) with long ears native to North America.

    National Geographic Society Noun

    (1888) organization whose mission is "Inspiring people to care about the planet."

    national monument Noun

    federal land set aside to protect objects of scientific and historical interest.

    national park Noun

    geographic area protected by the national government of a country.

    National Park Service Noun

    U.S. federal agency with the mission of caring "for special places saved by the American people so that all may experience our heritage."

    nocturnal Adjective

    active at night.

    non-native species Noun

    a type of plant or animal that is not indigenous to a particular area. Non-native species can sometimes cause economic or environmental harm as an invasive species.

    non-vascular plant Noun

    plant which does not use a specialized system of tissues to transport water and nutrients between different parts of the plant.

    potential Noun


    protocol Noun

    series of rules.

    reptile Noun

    animal that breathes air and usually has scales.

    saguaro Noun

    plant native to North America.

    sampling Noun

    a small part of a group observed and tested to represent the whole group.

    species inventory Noun

    a list of all the species of organisms living in a specific area.

    submit Verb

    to present for approval or consideration.

    symbiosis Noun

    two or more distinct organisms living together for the benefit of one or both.

    technique Noun

    method of doing something.

    temperature Noun

    degree of hotness or coldness measured by a thermometer with a numerical scale.

    Encyclopedic Entry: temperature
    tissue Noun

    cells that form a specific function in a living organism.

    tortoise Noun

    land-based turtle, usually with a tall, rounded shell.

    tribe Noun

    community made of one or several family groups sharing a common culture.

    urban area Noun

    developed, densely populated area where most inhabitants have nonagricultural jobs.

    Encyclopedic Entry: urban area
    vascular plant Noun

    group of plants which have specific tissues for transporting water and minerals throughout the plant.

    visual Adjective

    having to do with sight (vision).

    wildlife Noun

    organisms living in a natural environment.

    wildlife biologist Noun

    person who studies animals in their native habitats.

    Yaqui adjective, noun

    people and culture native to southwestern Arizona and northern Mexico.