What’s the difference between seaweed and kelp?

Seaweed is a term which can be used to describe many different marine-based species of plants and algae. But sea kelp is more specific. It describes the largest subgroup of seaweed. Seaweed ranges dramatically in size, whilst sea kelp is always quite large.

Which sea animals eat kelp?

Sea lions, harbor seals, sea otters, and sometimes whales not only eat the kelp, they also rely on the kelp forest for refuge. Invertebrates like sea stars and urchins cover the kelp forest floor.

Why are kelp forests dying?

Northern California’s kelp forests are declining due to two stressors. First, there has been unusual and drastic ocean warming in the area. Second, sea star wasting disease is killing the main predator of sea urchins, the sunflower sea star.

Why is there so much seaweed in california?

Caruso attributed the increase to warmer sea temperatures and storm swells that dislodged kelp from reefs. Warmer water from the tropics has fewer nutrients, which starves the kelp and releases it from the reefs, sending more of it through the Pacific and onto California beaches, according to experts.

Why kelp is not a plant?

Why is kelp not classified as a plant? Kelp, for all their outward complexity and internal structure, are not considered to possess more than one clearly defined tissue type. This being the case, they cannot be considered plants, and for this and other reasons they clearly aren’t animals or fungi either.

Does sea urchins use photosynthesis?

Sea urchins mainly congregate in colder, offshore waters, but sometimes travel into shallower waters looking for food. The green sea urchin of New England is often found in tide pools and below the low-tide line. They also tend to shy away from light. Their tests grow to a size of three or four inches.

Are diatoms photosynthetic?

Diatoms are known for their high photosynthetic efficiency particularly under fluctuating light conditions (Wagner et al., 2006).

Are sea urchin protostome or deuterostome?

It may surprise you to learn that both you and a sea urchin are deuterostomes. Adult sea stars, sea urchins, and sea cucumbers—the most familiar echinoderms—look so different from adult vertebrates (fishes, frogs, lizards, birds, and mammals) that it may be difficult to believe all these animals are closely related.

Are sea urchins deuterostomes?

It may surprise you to learn that both you and a sea urchin are deuterostomes. Adult sea stars, sea urchins, and sea cucumbers—the most familiar echinoderms—look so different from adult vertebrates (fishes, frogs, lizards, birds, and mammals) that it may be difficult to believe all these animals are closely related.

Are sea urchins useful?

Sea urchins are important herbivores on coral reefs, and in some ecosystems they play a critical role in maintaining the balance between coral and algae. Their role can be especially important on reefs where other herbivores (such as parrotfishes and rabbitfishes) have been depleted.

Are vultures herbivores?

Carnivore. Mainly carnivorous, the turkey vulture is a scavenger who will eat rodents, rabbits, other small mammals, birds, reptiles, insects and some vegetation.

Do decomposers do photosynthesis?

Decomposers break down organic matter. They are sinks for plant and animal wastes, but they also recycle nutrients for photosynthesis.

Do sea urchin spines dissolve?

Removing sea urchin spines with tweezers can cause them to break and splinter at the skin’s surface. The spines might appear to be gone but can remain in the deeper layers of skin. Instead, it is advisable for a person to soak the affected area in vinegar. Vinegar can help dissolve the spines.

Do sea urchins have chitin exoskeletons?

In the arthropods, including the insects, the principal component of the exoskeleton is chitin, with added calcium carbonate for strength. Other animals may have exoskeletons composed of calcium carbonate alone. Sea urchins belong to the Phylum Echinodermata, Class Echinoidea.

Does plankton photosynthesize?

Phytoplankton make their energy through photosynthesis, the process of using chlorophyll and sunlight to create energy. Like other plants, phytoplankton take in carbon dioxide and release oxygen.

How are sea urchin shells formed?

The shell is constructed of many small plates made of a strong material called calcium carbonate. Calcium carbonate is formed when calcium oxide, water, and carbon dioxide are combined.

How do a sea urchins get its energy?

Sea urchins feed mainly on algae, so they are primarily herbivores, but can feed on sea cucumbers and a wide range of invertebrates, such as mussels, polychaetes, sponges, brittle stars, and crinoids, making them omnivores, consumers at a range of trophic levels.

How do plants reproduce by spore formation?

Spore Formation is a method in Asexual Reproduction. Many Spores are stored in sacs called Sporangia. When Sporangia burst; minute single-celled, thin or thick walled structures called spores are obtained. Under suitable conditions, they develop into a new Plant.

How does oxygen levels affect sea otters?

When low-oxygen events occur, Leary will be able to track their movements through the kelp forest. … So after low-oxygen waves move through the kelp forest, they may leave pockets of hypoxic water along the bottom, altering and compressing fish habitats.

How does ph levels affect sea urchins?

Low pH had adverse effects on growth and morphology of sea urchin post-larvae. High pH generally had little effect on growth and development, but reduced settlement rates. Controlling pH in invertebrate culture systems might improve settlement rates and post-settlement growth.

How fertilization membrane is formed in sea urchin?

In the sea urchin, contents of the cortical granules are secreted within 30 sec of insemination. Several of these content proteins then bind to the nascent vitelline layer of the egg and lift off the cell surface to form a stable, impervious, fertilization envelope.

Is a urchin a carnivore herbivore or omnivore?

Feeding habits: Sea urchins are omnivores, meaning they eat both plants and animals, however they feed mostly on algae, along with decomposing matter. Their spines are used for protection and trapping food.

Is sea urchin abiotic or biotic?

Fletcher tested the hypothesis that sea urchins are a biotic factor limiting seaweed distribution.

What abiotic factors influence the rate of photosynthesis?

The rate of photosynthesis in a plant can be determined by three external factors: temperature, light intensity, and available carbon dioxide concentration. In any given situation any one of these may become a limiting factor if they are below the optimal level (Alott and Mindorff).

What are the larval arms of sea urchins used for?

The larva uses its ciliated arms to sweep food into its mouth as it glides through the water column. The arms can also be used to supplement the larva’s cilia-drive locomotion.

What do sea urchins depend on?

The primary food of many sea urchin species is seaweed. Here in Monterey Bay the primary food species is Macrocystis pyrifera, or giant kelp. This seaweed can grow several feet in one day!