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California's Salmon in Upstream Battle Against Drought

The prized fish already face numerous hurdles in wet years, but in times of drought their fortunes are even more tenuous.

By Joe Rosato Jr. • Published July 21, 2021 • Updated on July 22, 2021

Two Chinatown plaintiffs have filed more than 1,000 combined Americans With Disabilities Act (ADA) lawsuits across California since the pandemic began last year and rank among the most frequent filers in Northern California, according to an NBC Bay Area analysis of federal court records. Janelle Wang reports.

With drought-ravaged streams and rivers drying up across California and water regulators restricting flows on key waterways, environmental and fishing interests are fearing for the state's challenged salmon populations.

The prized fish already face numerous hurdles in wet years – from predators to environmental pressures – but in times of drought their fortunes are even more tenuous. The situation has become urgent in the Lagunitas watershed in West Marin County where feeder streams have dried up, trapping tiny endangered coho salmon and steelhead trout in puddles. 

"We’re in the second year of a drought here. It’s not doing the fish any favors," said Todd Steiner, director of the environmental group SPAWN. "We’re already talking about a critically endangered species on the verge of extinction, so this isn’t helping at all." 

To improve the chances of survival for chinook or king salmon – prized by fishermen – the state has trucked thousands of hatchery-raised salmon smolts to release in the San Francisco Bay. It means that the bulk of salmon returning to their spawning grounds in several years will likely be hatchery fish, having gotten a leg up over their naturally born cousins. 

"A few years from now there’ll basically be no naturally spawned fish returning to the Sacramento River," said John McManus, president of the Golden State Salmon Association. 

McManus said the salmon returning this year from their sojourns at sea will also face the drought's wrath. With reservoirs and dams dramatically low, state and federal regulators are making difficult decisions to restrict water flows on key rivers, potentially raising water temperatures to heights that threaten the salmon's ability to reproduce. 

"The federal government has told us we can expect river temperatures that are too high to sustain the eggs that will be laid this fall, which means we’re going to lose fish that would otherwise return three years from now," McManus said.

Since the salmon head out to sea for several years before returning to their birth place to spawn, McManus said the full impact of the drought won't be fully understood for years to come. 

"We’re living on salmon that were born two, three, four years ago," McManus said. "So, this year you’re not going to see it as much as you’ll see it in a few years."  

Even in wetter years, competition for the state's precious water pits fishing and environmental interests against agriculture – against residential communities. In a dry year, those battles heat up with the thermostat.

Preston Brown of the group SPAWN stands in dried-up Arroyo Creek near Lagunitas. The streams are traditionally spawning grounds for endangered coho salmon, which are being impacted by the drought.

"It’s a populated state with a lot of interests," said Preston Brown of SPAWN. "And those compete when resources get scarce." 

The Lagunitas Watershed is one of the last spawning grounds for endangered coho salmon – their population of roughly 20,000 fish represents only about 10% of their historical highs. 

Brown walked gingerly along the jagged stones lining the bed of Arroyo Creek – a tributary to Lagunitas Creek – the bone-dry surface broken up by small, occasional puddles holding tiny salmon and steelhead that became trapped on their journey to the ocean. 

"Normally we would have a little bit more water than this and it would be easy for fish to move up and down," Brown said.

Brown said if the dry spell extends into next winter, the fish will be robbed of their habitat and will potentially spawn late, which will create a domino effect of devastation. Compounding the troubles, the Marin County Municipal Water District is considering restricting flows from its reservoirs, which are standing at about 42% of capacity. 

"We’re asking for the water district and the state water board to really consider and have a full grasp of the full impacts before anything is considered," Brown said.

Individual decisions like reducing your water use on your lawn or not using animal products can make a long-term difference and prevent droughts, says behavioral scientist Sweta Chakraborty.

SPAWN recently revamped a small dam and fish ladder in the former Lagunitas Golf Course, an area known as Roy's Pools now dubbed Roy's Riffles. In place of the dam, the creek is now lined with rocks and foliage waiting for a spell of rain to kick-start their growth. Brown said the new habitat is better suited for the fish – at least it will be once the trickle of a stream is fed with a fresh supply of water. 

For all the intervention of humans in the salmon's plight, it seemed nature has yet to do its part in the rebirth. That point was driven home as Brown stood on a newly built bridge, looking at the tiny finger of water struggling to meander its way through the dry creek bed. 

"It has been impacted by the drought just like everything has," Brown said.

(Sources: NBC Bay Area)

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Enormous graveyard of alien-like sea creatures discovered at 'Jurassic Pompeii' in central UK

The spiky-limbed creatures saw their doom approaching, but could do nothing to stop it.

By , July 29, 2021 

An ancient seabed emerges from a cleaned limestone slab
An ancient seabed emerges from a cleaned limestone slab (Image credit: The Trustees of the Natural History Museum, London)

Paleontologists have uncovered an enormous fossil graveyard of squiggly, alien-like Jurassic sea creatures beneath a limestone quarry in the U.K.'s Cotswolds region.

The fossil find includes perhaps tens of thousands of marine invertebrates called echinoderms — meaning "hedgehog skin" in Greek, and including the ancient ancestors of modern starfish, sea cucumbers, sea urchins and frilly-limbed sea lilies — immaculately preserved at all stages of their life cycles, the researchers said in a statement.

But right when things were booming, the thriving seabed community met a cataclysmic end; a mysterious catastrophe — perhaps a mudslide triggered by an earthquake — suffocated and entombed the animals for 167 million years.

"What we've got here is a sort of Jurassic Pompeii," Neville Hollingworth, an amateur fossil hunter who discovered the cache on a hike with his wife Sally, told BBC.com.

"[The creatures] tried to protect themselves, adopting the stress position of pulling their arms in, but it was all in vain," Tim Ewin, a paleontologist and senior curator at the Natural History Museum of London, told BBC. "They were pushed into the sediment and buried alive."


Researchers hope these fossils will reveal insights into the evolutionary development and diversification of these iconic and ecologically important echinoderms (Image credit: The Trustees of the Natural History Museum, London)

The site dates to the middle Jurassic period (roughly 200 million to 145 million years ago), when gargantuan sauropods and bloodthirsty theropod dinosaurs had the run of the land. At sea, things were in transition; as many as half of all marine species had died in an extinction event at the end of the Triassic period, and spindly-armed echinoderms were evolving like mad to fill the gap.

Noted for limbs that radiate out of their bodies in sets of five, echinoderms had become highly successful at grabbing passing food with their spiny arms, according to the researchers. Some, like starfish and sea cucumbers, could feel their way along the bottom of the ocean. Others, like sea lilies, anchored themselves in place and waited for meals to come to them.

This seabed site was likely quite shallow, perhaps measuring about 65 to 130 feet (20 to 40 meters) deep, the team said. Whereas it was located in central England today, the area was closer to what is now North Africa in the mid-Jurassic, and the waters were far warmer than they are now.

While it's impossible to know what exactly doomed this massive community, the researchers are thankful for whatever it was; if not preserved beneath smothering mud, these ancient creatures would have likely been picked clean by scavengers, leaving little behind to study, the team said.

With thousands upon thousands of diverse specimens to examine, the researchers hope to learn more about echinoderm evolution during the Jurassic — including the description of several new species. Alongside the animals, the team also found preserved wood and pollen samples in the rocks, which could reveal more details about climate changes at the time.

"We'll describe in detail the new species and describe the variability of the plants and animals we have found at the site," Ewin said in the statement. "There will be another project looking at the population dynamics of the particular echinoderm groups and what that tells us about their ecology."

Brandon Specktor

Brandon has been a senior writer at Live Science since 2017, and was formerly a staff writer and editor at Reader's Digest magazine. His writing has appeared in The Washington Post, CBS.com, the Richard Dawkins Foundation website and other outlets. He holds a bachelor's degree in creative writing from the University of Arizona, with minors in journalism and media arts. He enjoys writing most about space, geoscience and the mysteries of the universe.


(Sources: Live Science)

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Climate Change Is Decimating Monarch Populations, Research Shows

Western monarchs have lost 99.9 percent of their numbers since the 1980s

By JULY 28, 2021

The butterflies have experienced major losses in populations on both the East and West coasts. (TexasEagle via Flickr under CC BY-NC 2.0)

In many ways, monarch butterflies are the poster child of the insect world. Amateur and professional entomologists alike celebrate the insects’ iconic black-and-orange wings.

However, the beautiful butterfly is under severe threat. Its numbers are dwindling precipitously and scientists are not sure why. Populations of eastern monarchs have declined more than 80 percent in the past two decades while western monarchs have fallen 99.9 percent since the 1980s.

A new study has linked climate change a major driver of monarch population loss. Researchers examining data from 18,000 monarch counts in the United States, Canada and Mexico learned the species is extremely sensitive to weather conditions in its spring and summer breeding grounds.

“Yes, climate change is happening,” study author Elise Zipkin, an ecologist at Michigan State University, tells Adam Vaughn of New Scientist. “It looks like it’s affecting monarchs. Now we have this information, we can have a smart plan for what we might do for conservation of monarchs and other wildlife.”

Published July 19 in Nature Ecology & Evolution, this study reviewed information culled from 25 years of population counts. Zipkin and her colleagues discovered that rainfall and temperature deviations from long-term averages over the past 15 years were seven times more impactful than other causes, including herbicides, pesticides and habitat loss.

Scientists plowed through numbers from two periods: 1994 to 2003 and 2004 to 2018. For the most recent timeframe, weather fluctuations in the spring and summer had the most impact on populations, severely damaging breeding cycles and growth stages.

However, from 1994 to 2003, monarch populations also dropped steeply, but that decline seems to be driven by herbicide use, as well as changing weather patterns.

“Unless more data become available somewhere, it’s impossible to say with certainty what caused the decline during that earlier time period,” Zipkin tells Kate Baggaley of Popular Science.

The monarch butterfly is seen as an indicator species, so what happens to it may foretell similar problems for other insects.

Butterflies, honeybees, bumblebees and other pollinators are crucial for the reproduction of many plants, including 35 percent of the world’s food crops, according to the Natural Resources Conservation Service, an agency within the U.S. Department of Agriculture.

In an effort to turn the tide and help monarchs make a comeback, volunteers are planting milkweed at eight sites across California, reports Erin McCormack of The Guardian. The poisonous plant is essential for the butterfly’s life cycle and an important food source for larvae, providing color later for their final-stage wings. Caterpillars devour milkweed leaves before entering the pupa stage and then emerging as butterflies.

California contributed $1.3 million to restore nearly 600 acres of habitat with 30,000 native milkweed plants. The effort is being led by River Partners, a nonprofit group that provides assistance with land restoration and reforestation projects.

To get a better understanding on what is happening, researchers are turning to the public for help. Several universities have banded together for the Western Monarch Mystery Challenge. Using the iNaturalist smartphone app, gardeners and backyard scientists are encouraged to snap photos of monarchs and include details of the sightings. Scientists say this effort will provide a better understanding of factors impacting the species.

“There are big gaps in our knowledge about monarch biology and behavior,” says researcher Cheryl Schultz of Washington State University in a report about the challenge.

Conservationists hope they have time to save the butterfly. Hillary Sardiñas, pollinator coordinator for the California Department of Fish and Wildlife, says it is critical to end this “death by a thousand cuts.”

“Monarchs are incredibly iconic,” she tells McCormack. “It would be horrible to lose these incredible butterflies that have captured people’s imagination for hundreds of years.”

David Kindy

David Kindy is a journalist, freelance writer and book reviewer who lives in Plymouth, Massachusetts. He writes about history, culture and other topics for Air & SpaceMilitary HistoryWorld War IIVietnamAviation HistoryProvidence Journal and other publications and websites.

Read more from this author | 

(Sources: Smithsonian Magazine)
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Ibuku completes "unprecedented" bamboo building in the Balinese jungle

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Architecture studio Ibuku has completed The Arc gymnasium for a private school in Bali featuring a complex double-curved roof made entirely from bamboo.

The Arc is the latest building to be completed on the site of the Green School – a private educational institution that promotes sustainability through learning in a natural environment.

Top: The Ark is made from bamboo. Above: it is surrounded by a forest

The building was designed by Green School founders John and Cynthia Hardy's daughter Elora Hardy and her studio Ibuku in collaboration with bamboo architect Jörg Stamm and structural engineering firm Atelier One.

It forms a protective roof sheltering a multipurpose sports court with a floor area of 760 square metres.

The Ark has a ribbed form
The undulating canopy covers a sports pitch

The lightweight structure features bamboo arches that support an organically shaped canopy. The 14-metre-high arches are connected by anticlastic gridshells that curve in two directions to create a robust, tensioned structure.

"The concepted structure for The Arc is totally unprecedented," claimed Ibuku project architect Rowland Sauls.

"Embarking on a design never before executed required some bravery and optimism. We were creative and stubborn enough to research and develop the answers needed for the success of the project."

The Ark was constructed using bamboo
The organically shaped roof was made from bamboo

The building's organic form and structural system were informed by natural systems, in particular the way our ribcages are held in place by the tension from an outer layer of muscle and skin.

"The Arc operates like the ribs of a mammal's chest," explained Stamm, "stabilised by tensile membranes analogous to tendons and muscles between ribs."

"Biologically, these highly tensile microscopic tendons transfer forces from bone to bone," he continued.

"In The Arc, bamboo splits transfer forces from arch to arch."

The Ark's canopy roof extends to the floor
The arched interior that echoes the shape of a mammals rib cage

Several months of research and development led to the creation of a precise geometrical solution that allowed the structure to enclose a large inner volume with a minimal amount of material.

"The gridshells use shape stiffness to form the roof enclosure and provide buckling resistance to the parabolic arches," said Atelier One director, Neil Thomas.

"The two systems together create a unique and highly efficient structure," he added, "able to flex under load allowing the structure to redistribute weight, easing localised forces on the arches."

Student pictured within the pavilion
Floor space is column-free

The arches supporting the pavilion's roof span 19 metres and allow for a large floor area that is uninterrupted by supporting columns.

Spaces around the base of the canopy allow breezes to flow through, providing natural ventilation. Vents at the roof's apex also allow warm air to escape.

Air can circulate through its openings

The Green School has been constructing bamboo buildings at its campus in Bali, Indonesia, since it was founded in 2008. The school now also operates campuses in New Zealand, South Africa and Mexico.

All of the buildings at the jungle site in Bali's Badung regency are designed to be energy efficient and constructed using natural materials wherever possible.

John Hardy and Jörg Stamm worked together with designer Aldo Landwehr to create the initial buildings and infrastructure including bridges and a spiralling three-storey building housing the high school and administrative areas.

The Ark's bases have a textural quality
It is anchored to the ground

Bamboo was also used by Chinese firm LLLab to create an undulating riverside canopy on the site of a popular light show, while Ruta 4 also constructed a clothing factory in rural Colombia from bamboo.

Photography is by Tommaso Riva.

(Sources: DeZeen)

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