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Posts by ⛏ Thomas Hammerich

Screenshot 

Mu, T., Zeng, Y. & Lu, Z. Turning the tide of climate solutions to save tidal flats. Nat Sustain (2026). https://doi.org/10.1038/s41893-026-01802-1

https://www.nature.com/articles/s41893-026-01802-1

Screenshot Mu, T., Zeng, Y. & Lu, Z. Turning the tide of climate solutions to save tidal flats. Nat Sustain (2026). https://doi.org/10.1038/s41893-026-01802-1 https://www.nature.com/articles/s41893-026-01802-1

⚠️ Wichtige Diskussion über unbeabsichtigte ökologische Folgen der Standortwahl #Erneuerbare Energien. ⚠️

‼️ Schützt das #Wattenmeer vor Fehlsteuerungen im #Klimaschutz ‼️

🦑 #Niedersachsen #OffshoreWind #Kohlenstoffsenke

👇
www.nature.com/articles/s41...

1 day ago 0 0 0 0
TEXT
"Wild boars shape ecosystems via:

1. Soil disturbance (“bioturbation”)
• digging, rooting → creates patches,
microtopography 

2. Disturbance regimes 
• maintain early successional habitats 
• prevent ecological homogenization 

3. Resource redistribution 
• expose seeds, fungi, invertebrates 
• alter nutrient cycles 

4. Habitat creation 
• wallows → micro-wetlands 
• disturbed patches → colonization sites"


Text (German/Deutsch)
"Wildschweine gestalten Ökosysteme durch:

1. Bodenstörung („Bioturbation“)
• Wühlen und Graben → schafft offene Stellen und Mikrorelief 

2. Störungsdynamiken
• erhalten Lebensräume früher Sukzessionsstadien 
• verhindern ökologische Vereinheitlichung 

3. Umverteilung von Ressourcen
• legen Samen, Pilze und Wirbellose frei 
• verändern Nährstoffkreisläufe 

4. Schaffung von Lebensräumen
• Suhlen → Mikro-Feuchtgebiete 
• gestörte Flächen → Besiedlungsstandorte"

TEXT "Wild boars shape ecosystems via: 1. Soil disturbance (“bioturbation”) • digging, rooting → creates patches, microtopography 2. Disturbance regimes • maintain early successional habitats • prevent ecological homogenization 3. Resource redistribution • expose seeds, fungi, invertebrates • alter nutrient cycles 4. Habitat creation • wallows → micro-wetlands • disturbed patches → colonization sites" Text (German/Deutsch) "Wildschweine gestalten Ökosysteme durch: 1. Bodenstörung („Bioturbation“) • Wühlen und Graben → schafft offene Stellen und Mikrorelief 2. Störungsdynamiken • erhalten Lebensräume früher Sukzessionsstadien • verhindern ökologische Vereinheitlichung 3. Umverteilung von Ressourcen • legen Samen, Pilze und Wirbellose frei • verändern Nährstoffkreisläufe 4. Schaffung von Lebensräumen • Suhlen → Mikro-Feuchtgebiete • gestörte Flächen → Besiedlungsstandorte"

In Europe, where porcupines are absent, a similar ecological role is likely fulfilled by wild boars, roe deer (Capreolus spp.), and beavers.

👇 👇
🐗 🐗 🐗 🐗 🐗 🐗
(Deutsche Übersetzung im ALT)

1 day ago 2 0 0 0
Preview
Substance Without Spectacle How the Loss of Ground Sloths and Porcupines Turned Forests into Fuel

Great writing by @Race2Extinct.bsky.social on how #forest, all #wildlife creatures great & small and #wildfire are all interconnected.

👉 "🌳🌳🌳🌲🌳🌲 do not make a forest. Function does!" 👈

👇 👇
lylel.substack.com/p/substance-...

3 days ago 4 0 1 0

Just beautiful! Very colourful rocks

4 days ago 0 0 0 0
Close-up of a mammilaria cactus with sharp spines. A delicate white flower with pink stripes blooming at its center.

Picture: Thomas Hammerich

Close-up of a mammilaria cactus with sharp spines. A delicate white flower with pink stripes blooming at its center. Picture: Thomas Hammerich

🌼 #FlowerFriday 🏜

Beauty in the harshest places 🌵

A delicate #mammilaria bloom surrounded by armor 🌸

🌱 #Cactus #Succulents
#Bloom #gardening

4 days ago 38 3 0 0
Screenshot of NASA's Artemis II Crew Comes Home (Official Broadcast) on YouTube.

Screenshot of NASA's Artemis II Crew Comes Home (Official Broadcast) on YouTube.

#Splashdown - Mission accomplished!

- What an incredible picture -

Love it!

#NASA #NASAArtemis

1 week ago 7 0 0 0
HVO/USGS Volcanic Activity Notice

Volcano: Kilauea (VNUM #332010)
Issued: Thursday, April 9, 2026, 8:02 PM HST
Source: Hawaiian Volcano Observatory
Notice Number: 2026/H178
Location: N 19 deg 25 min W 155 deg 17 min
Elevation: 4091 ft (1247 m)
Area: Hawaii

Episode 44 of the ongoing Halemaʻumaʻu eruption ended abruptly at 7:41 p.m. HST on April 9 after 9 hours of continuous lava fountaining. fountaining. Due to reduced ground and aviation hazards, the USGS is dropping the Volcano Alert Level from WATCH to ADVISORY and the Aviation Color Code from RED to YELLOW. Additional details on this eruptive episode will be provided in the next official report.

All eruptive vents and lava flows are confined to Halemaʻumaʻu crater within Hawaiʻi Volcanoes National Park. Tephra fall from volcanic ash clouds is greatest within 3 miles (5 km) of the vents, lighter ash and Pele's Hair may stay suspended for large distances from the vents.

HVO/USGS Volcanic Activity Notice Volcano: Kilauea (VNUM #332010) Issued: Thursday, April 9, 2026, 8:02 PM HST Source: Hawaiian Volcano Observatory Notice Number: 2026/H178 Location: N 19 deg 25 min W 155 deg 17 min Elevation: 4091 ft (1247 m) Area: Hawaii Episode 44 of the ongoing Halemaʻumaʻu eruption ended abruptly at 7:41 p.m. HST on April 9 after 9 hours of continuous lava fountaining. fountaining. Due to reduced ground and aviation hazards, the USGS is dropping the Volcano Alert Level from WATCH to ADVISORY and the Aviation Color Code from RED to YELLOW. Additional details on this eruptive episode will be provided in the next official report. All eruptive vents and lava flows are confined to Halemaʻumaʻu crater within Hawaiʻi Volcanoes National Park. Tephra fall from volcanic ash clouds is greatest within 3 miles (5 km) of the vents, lighter ash and Pele's Hair may stay suspended for large distances from the vents.

HVO/USGS Volcanic Activity Notice
Volcano: Kilauea (VNUM #332010)

🌋 Current Volcano Alert Level: ADVISORY
(Previous Volcano Alert Level: WATCH)

✈ Current Aviation Color Code: 🟡
(Previous Aviation Color Code: 🔴)

🚫 Episode 44 of the ongoing Halemaʻumaʻu eruption ended abruptly 🚫

1 week ago 2 0 0 0
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Screenshot of USGS Youtube:

[V3cam] Kīlauea volcano, Hawaii (south Halemaʻumaʻu crater)

https://m.youtube.com/watch?v=gXKuUyKt8mc

Screenshot of USGS Youtube: [V3cam] Kīlauea volcano, Hawaii (south Halemaʻumaʻu crater) https://m.youtube.com/watch?v=gXKuUyKt8mc

"North vent lava fountains have reached 240 meters (800 feet) in height during the past hour."

🌋 Another impressive eruption! Let’s hope the ash stays limited and doesn’t spread too far.

1 week ago 6 0 1 0
Source: USGS 
TEXT:
Volcanic Activity Summary:
Episode 44 of lava fountaining in Halemaʻumaʻu began at the summit of Kīlauea began at 11:10 a.m. HST on April 9 and continues as of this notice. 
The National Weather Service reports that the plume from this eruption is reaching 15,000 feet (4,500 meters) above sea level. North vent lava fountains are currently reaching 190 meters (625 feet) above ground level. Ground-level sensors near the eruptive vents indicate that winds are blowing from the south, which suggests that volcanic gas emissions and volcanic material may be distributed to the north and north-northeast from Halemaʻumaʻu. 

All eruptive vents and lava flows are confined to Halemaʻumaʻu crater within Hawaiʻi Volcanoes National Park. Tephra fall from volcanic ash clouds is greatest within 3 miles (5 km) of the vents, lighter ash and Pele's Hair may stay suspended for large distances from the vents.

Source: USGS TEXT: Volcanic Activity Summary: Episode 44 of lava fountaining in Halemaʻumaʻu began at the summit of Kīlauea began at 11:10 a.m. HST on April 9 and continues as of this notice.  The National Weather Service reports that the plume from this eruption is reaching 15,000 feet (4,500 meters) above sea level. North vent lava fountains are currently reaching 190 meters (625 feet) above ground level. Ground-level sensors near the eruptive vents indicate that winds are blowing from the south, which suggests that volcanic gas emissions and volcanic material may be distributed to the north and north-northeast from Halemaʻumaʻu.  All eruptive vents and lava flows are confined to Halemaʻumaʻu crater within Hawaiʻi Volcanoes National Park. Tephra fall from volcanic ash clouds is greatest within 3 miles (5 km) of the vents, lighter ash and Pele's Hair may stay suspended for large distances from the vents.

👉 UPDATE:
HVO/USGS Volcanic Activity Notice

Volcano: Kilauea (VNUM #332010)

🌋Current Volcano Alert Level: WARNING
🌋Previous Volcano Alert Level: WATCH

Current Aviation Color Code: 🔴
Previous Aviation Color Code: 🟠

Issued: Thursday, April 9, 2026, 12:36 PM HST
Notice Number: 2026/H174

1 week ago 4 1 1 0

#USGS #Kilauea #volcano #Hawaii live cams:

👇 👇 👇
[V1cam] (west Halemaʻumaʻu crater)
m.youtube.com/watch?v=NDA9...

[V2cam] (east Halemaʻumaʻu crater)
m.youtube.com/watch?v=Tz5t...

[V3cam] (south Halemaʻumaʻu crater)
m.youtube.com/watch?v=gXKu...

1 week ago 4 1 1 0
Post image

HVO/USGS Volcanic Activity Notice

Volcano: Kilauea (VNUM #332010)
🌋 Current Volcano Alert Level: WATCH
✈ Current Aviation Color Code: 🟠

Volcanic Activity Summary:
‼️ Episode 44 of lava fountaining in Halemaʻumaʻu at the summit of Kīlauea began at 11:10 am HST on April 9 ‼️

#Volcano #Volcanism

1 week ago 9 2 1 0
Text:
(German)
Interferenzfarben:
Die bunten Farben entstehen durch Licht-Interferenz in doppelbrechenden Materialien. Ihre Intensität hängt von der Doppelbrechung und der Probendicke ab.

Mit der Michel-Lévy-Tafel lassen sich daraus Rückschlüsse auf Minerale ziehen:

• Grau = geringe Doppelbrechung
   (z. B. Quarz)

• Bunt = hohe Doppelbrechung 
   (z. B. Calcit)

Fazit: Farben = Schlüssel zur Mineralbestimmung

(English: Google translation)
Interference colors:
The bright colors arise from light interference in birefringent materials. Their intensity depends on birefringence and sample thickness.

Using the Michel-Lévy chart, conclusions about minerals can be drawn:

• Gray = low birefringence
(e.g.: quartz)

• Colorful = high birefringence
(e.g.: calcite)

Conclusion: Colors = key to mineral identification

Text: (German) Interferenzfarben: Die bunten Farben entstehen durch Licht-Interferenz in doppelbrechenden Materialien. Ihre Intensität hängt von der Doppelbrechung und der Probendicke ab. Mit der Michel-Lévy-Tafel lassen sich daraus Rückschlüsse auf Minerale ziehen: • Grau = geringe Doppelbrechung (z. B. Quarz) • Bunt = hohe Doppelbrechung (z. B. Calcit) Fazit: Farben = Schlüssel zur Mineralbestimmung (English: Google translation) Interference colors: The bright colors arise from light interference in birefringent materials. Their intensity depends on birefringence and sample thickness. Using the Michel-Lévy chart, conclusions about minerals can be drawn: • Gray = low birefringence (e.g.: quartz) • Colorful = high birefringence (e.g.: calcite) Conclusion: Colors = key to mineral identification

》"...Unter Polarisationsmikroskopen zeigen Falschfarben die Zusammensetzung..." 《

Nur als Ergänzung:
Diese "Falschfarben" nennt man Interferenzfarben in der Polarisationsmikroskopie.

👇 👇
(English translation of picture pls see ALT)

#Geologie #Geology #Geoscience

2 weeks ago 0 0 0 0
Geologists’ Day greeting card showing two geologists overlooking a quarry in a mountainous landscape. In the foreground are a rock hammer, map, compass, field notebook, binoculars, and several rock and mineral samples, with an oil rig in the distance.

Geologists’ Day greeting card showing two geologists overlooking a quarry in a mountainous landscape. In the foreground are a rock hammer, map, compass, field notebook, binoculars, and several rock and mineral samples, with an oil rig in the distance.

Happy ⛏ #GeologistsDay
celebrating those who read the Earth like a book and reveal its hidden history, layer by layer.

🔎 Every first Sunday in April, it signals the start of field season - after winter, geologists return to 🧭🥾 expeditions, 📓🖍mapping, and 🌋 discovery.

#Geology #Geoscience

2 weeks ago 15 3 0 1
Old style Easter greeting card

Old style Easter greeting card

Happy Geo-Easter! ⛏️🥚
¡Felices Pascuas!
Joyeuses Pâques!
Buona Pasqua!
Glad Påsk!
Fasseh Majeed!

May your day be gneiss, your eggs well sedimented, and your chocolate discoveries truly rock!

#GeologyRocks #Easter #geology #art

2 weeks ago 11 0 0 0
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Wonderful! Oh yes - beautiful place.
I really like how clearly you can see the regional long-term tectonic processes, with all the different coastal terraces formed by uplift during earthquakes. I was lucky enough to do the Peninsula walk before and after 2016. A geologist’s playground!

2 weeks ago 1 0 1 0

Yes - me too! 🖖🏻 Let's start... Engage.

2 weeks ago 0 0 0 0
Steeply dipping, thin-bedded slabs of bright white color carbonate. Syncline like structure in the middle of the picture.

Picture: Thomas Hammerich

Steeply dipping, thin-bedded slabs of bright white color carbonate. Syncline like structure in the middle of the picture. Picture: Thomas Hammerich

#FossilFriday

📷 Paleogene sedimentary rock (limestone) with Syncline-like structure/tectonic tilting

🔎 Originally deposited as horizontal marine sediments, later tectonically uplifted & bended/tilted.

📍 South Bay, Kaikoura, New Zealand 🇳🇿

🦑 #geology #geoscience #paleontology #fossil

2 weeks ago 14 0 0 0
Screenshot of NASA AROW:

https://www.nasa.gov/missions/artemis-ii/arow/

Screenshot of NASA AROW: https://www.nasa.gov/missions/artemis-ii/arow/

🚀 Moonbound!

#NASA #Artemis II is underway 🚀 - checking the moon for the next visit with a geologist! ⛏😉

Want to know where the crew and spacecraft are right now?

The AROW link gives a live overview of position, trajectory & mission progress.

Follow along 👇

www.nasa.gov/missions/art...

2 weeks ago 3 0 0 0

I think I just cracked the case of the missing #KitKat… and it goes deeper than anyone thought 🪨🍫

🔎 Now: who did it?

#KitKatHeist

2 weeks ago 3 0 0 0
Flukenidentifikation | Wale erkennen | WDC Deutschland Durch die Flukenidentifikation können Wale und Delfine anhand ihrer Flossen wiedererkannt und ihre Verbreitung dokumentiert werden.

2/2

👉 de.whales.org/wale-delfine...

👉 happywhale.com/home

👉 www.flukebook.org

👉 www.oceanicsociety.org/resources/wh...

3 weeks ago 1 0 0 0
Bild: 
"A Visual Guide to Whale Fluke Identification"

QUELLE:
https://www.oceanicsociety.org/resources/whale-fluke-identification-guide/

Bild: "A Visual Guide to Whale Fluke Identification" QUELLE: https://www.oceanicsociety.org/resources/whale-fluke-identification-guide/

Text:
"Buckelwale lassen sich eindeutig an ihrer Fluke identifizieren 🐋
Jede Schwanzflosse ist so einzigartig wie ein Fingerabdruck.
Forscher nutzen Foto-ID: Aufnahmen beim Abtauchen werden mit Katalogen abgeglichen, um einzelne Tiere zu erkennen."

Text: "Buckelwale lassen sich eindeutig an ihrer Fluke identifizieren 🐋 Jede Schwanzflosse ist so einzigartig wie ein Fingerabdruck. Forscher nutzen Foto-ID: Aufnahmen beim Abtauchen werden mit Katalogen abgeglichen, um einzelne Tiere zu erkennen."

Wurde die #Buckelwal Fluke inzwischen mal fotografiert & abgeglichen, ob schon in den Online Datenbanken vorhanden?

🔎 = Herkunft+Background ermitteln

👇 Es gibt einige 🐋-Datenbanken

1/2

#Ostsee #Wismar #Walrettung #TimmendorferStrand #Niendorf #citizenscience

3 weeks ago 1 0 1 0

Lovely flowers!

3 weeks ago 0 0 0 0
Picture of Phaedranassa tunguraguae flowers in green+red.

Picture: Thomas Hammerich

Picture of Phaedranassa tunguraguae flowers in green+red. Picture: Thomas Hammerich

🌺 #FlowerFriday update 🌿

The #Phaedranassa tunguraguae has now started to bloom and two flowers have opened (in the evening/at night).

🌱
#Amaryllidaceae #Tungurahua #Ecuador #plants #flowers #gardening #plantlovers

3 weeks ago 11 1 0 0
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Picture of Dr. Biruté Mary Galdikas, the
World’s Leading Expert on Orangutans,
giving a tour at the Orangutan Care
Center and sharing insights of her
work on Borneo.

Picture: Thomas Hammerich

Picture of Dr. Biruté Mary Galdikas, the World’s Leading Expert on Orangutans, giving a tour at the Orangutan Care Center and sharing insights of her work on Borneo. Picture: Thomas Hammerich

I was deeply saddened to hear of the death of Orangutan Foundation founder & president, Dr. Biruté Mary Galdikas, yesterday.

Many years ago, I had the privilege of working with her & assisting with her lectures on orangutans. She was a remarkable woman.

orangutan.org

3 weeks ago 3 0 0 0
Picture of a street sign in dark green with yellow letters "Tom's Track", Kaikoura, New Zealand.

Picture of a street sign in dark green with yellow letters "Tom's Track", Kaikoura, New Zealand.

No worries!
Aaaaah...yes! Kaikõura... I know it well: Kaikõura Museum has nice Bio+Geo (fossils!) section, Whaler 🍻, did the Kaikõura Peninsula walk a couple of times! I love it! Great geo around Limestone Bay!! Know Point Kean...will have a look into my pics! There is "Tom's Track" as well 🙂👌.

1 month ago 2 0 1 0

For the geological investigation/interpretation it is very useful to give further details like location or any other useful observations.

With location you'll look into geological maps. These will give further information like age, rock type etc. So you can look up what fossils could be present.

1 month ago 0 1 1 0
Globorotalia menardii

is a tropical-to-subtropical planktonic foraminifera used as a "paleothermometer" and proxy for thermocline depth, as its abundance increases during warmer periods and decreases during glacial, cold periods. 

Studies show high abundance in the Holocene compared to last glacial, reflecting its sensitivity to salinity, temperature, and upper water column structure.

Often used in connection with marine sediment cores.

Picture: Thomas Hammerich
Natural size of G.m.: 0.5mm /0.02inch !!

Globorotalia menardii is a tropical-to-subtropical planktonic foraminifera used as a "paleothermometer" and proxy for thermocline depth, as its abundance increases during warmer periods and decreases during glacial, cold periods. Studies show high abundance in the Holocene compared to last glacial, reflecting its sensitivity to salinity, temperature, and upper water column structure. Often used in connection with marine sediment cores. Picture: Thomas Hammerich Natural size of G.m.: 0.5mm /0.02inch !!

⛏ Almost #FossilFriday

📷 Globorotalia menardii,
tropical-to-subtropical planktonic foraminifera.

🔎Used in marine Paleoclimatology & P-oceanography as "paleothermometer" & proxy thermocline depth, Abund ⬆️during warmer periods/⬇️during glacial periods.

🦑 #geology #geoscience #paleontology #fossil

1 month ago 9 1 0 0
Picture of (potted plant) Phaedranassa tunguraguae: left picture side the dry brown old flower stalk leftover is visible. In the middle is the green lower part of a leaf. Right side the developing new flower stalk is developing/growing upwards from below. In the inside a flower is visible already.

Picture: Thomas Hammerich

Picture of (potted plant) Phaedranassa tunguraguae: left picture side the dry brown old flower stalk leftover is visible. In the middle is the green lower part of a leaf. Right side the developing new flower stalk is developing/growing upwards from below. In the inside a flower is visible already. Picture: Thomas Hammerich

🌺 #FlowerFriday 🌿

My #Phaedranassa tunguraguae surprised me once again today!

Just 4 months after the last flower stalk started growing, it is growing another flower stalk. More flowers soon!

🌱
#Amaryllidaceae #Tungurahua #Ecuador #plants #flowers #gardening #plantlovers

1 month ago 11 1 1 0
Preview
Volcano Watch — Episode 43, new fountain height record and tephra fallout on communities Episode 43 at the summit of Kīlauea began at 9:17 a.m. HST on March 10, 2026, and continued for 9 hours. Both the north and south vents erupted lava fountains, with the south vent fountain reaching 17...

Please find additional information about Episode 43 in the actual edition of 'Volcano Watch', the weekly article & activity update - written by the U.S. Geological Survey Hawaiian Volcano Observatory.

👇 👇
www.usgs.gov/observatorie...

1 month ago 3 1 0 0

❓ 📷 🔎📒

❓ Has someone pictures (overview +details with 📐) of the mentioned "football sized" or other volcanic debris of E43?

#Hawaii #Kilauea

1 month ago 0 0 1 0