An Orb-weaver spider (Araneus diadematus) in Rennes, western France (Photo: Damien Meyer/ AFP/Getty Images)
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City living is making spiders bigger, study finds

According to new research, city-dwelling spiders are larger and more fertile than their rural-dwelling relatives.

The growth of cities destroys the homes of many animals. With habitats drenched in cement, their only option is to relocate - and in the worst cases, urban expansion can cause species extinction. However, it’s not all doom and gloom for some species, as city living appears to bring out the best in them. Have you noticed that spiders are looking meatier nowadays?

According to new research, city-dwelling spiders are flourishing. Similar to rats and pigeons, spiders are “urban exploiters”. This means that they thrive in urban surroundings. Despite our squeamish attitudes towards them, spiders are important creatures: they greatly impact food webs, plant colonies and herbivore abundance, and they help to control the insect populace.

Most research on the expansion of cities focuses on birds. For instance, noise pollution has forced birds to change their calls, while other studies show that some birds have even stopped migrating. Researchers from the University of Sydney, however, were interested in the changes in spider anatomy that might have come from living in cities, and specifically Golden Orb-Weaving (Nephilla Plumipes) spiders, which are common in both urbanised and rural Australian landscapes. They build strong semi-permanent webs with golden-looking silk, and, once matured, they reside in this web their entire life. Thus, their “coach potato” lifestyle makes them ideal research subjects.

The researchers collected 222 spiders from rural and urbanised areas. All spiders were female and had reached maturity, and their body size, fat reserves, and ovary weight were recorded. The findings showed that rural-dwelling spiders had smaller bodies, but that city-dwelling spiders were larger, and more fertile. Places with roads, buildings and a lack of greenery typically denoted larger spiders. The researchers proposed that temperature differences could explain these results, as cities are much warmer than rural areas thanks to the urban heat island effect.

Their results could also reflect differences in prey availability. The study's lead author, ecologist Elizabeth Lowe, explained in more detail:

There were strong associations in particular between spider size and the presence of hard surfaces (such as roads and buildings) and lack of vegetation. These hard surfaces contribute to the urban “heat island” effect, which makes it warmer in cities than surrounding areas. It is also likely that there is more food for the spiders in the city as a result of night lighting and increased resources. This combination of warm temperatures and more food would allow spiders to put more energy towards growth and reproduction. Fewer predators and parasites in urban areas could also allow urban spiders to grow larger.”

This study is only applicable to one species of spider in one Australian city, so it's not fair yet to say that all urban spiders are getting bigger - so don't panic about huge spiders with larger ovaries just yet. However, the researchers pledge that this is promising news:

The fact that some spiders benefit from urbanisation is a good thing. In order to maintain biodiversity in cities, we need to be able to support diverse populations of spiders and other invertebrates” Lowe said. “By gaining a better understanding of the impacts of urbanisation on wildlife in cities, we can work towards creating healthy, functioning ecosystems in urban areas." 

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Defining The Defenders: the long history of the superhero team-up

Netflix's new show draws on an established traditon of bringing together disparate characters.

Today Marvel’s The Defenders dropped worldwide. It’s the culmination of Marvel Studios’ interlinked series for Netflix, and all episodes will be available simultaneously as is the streaming services’ wont.

The Defenders, and the Netflix series that have preceded it, seem modelled on how the Marvel Cinematic Universe films have worked in multiplexes. At least superficially. Characters get their own solo films/series, which become increasingly interlinked over time, before all featuring together in an onscreen ‘team up’. Here, they combine against a threat greater than any they could plausibly win against on their own, sparring and generating alliances, friendships and even enmities in the process.

This structure, of course, is Marvel’s film and TV projects aping their source material. Marvel’s comics, and superhero comics more generally, have long relished the "team up" and the "super team". The use of this approach by Marvel’s other media ventures is intuitively right, allowing the mass audience for film and television to experience one of the specific pleasures of how superhero comics work in the characters’ new medium.

The concept of the super team goes back a long way. The Justice Society of America, from Marvel’s Distinguished Competition, is usually considered the first. They debuted in All-Star Comics #3 (1940) and the team consisted of the Flash (the Jay Garrick version, Flash TV fans), Green Lantern, Hawkman, and now lesser known characters like Hour-Man, the Sandman (not the Neil Gaiman one), the Atom, The Spectre and Doctor Fate. Within a few issues Wonder Woman would join: as secretary. Because it was the 1940s.

What’s interesting about this initial super team is that half of these characters were published by All-American Comics (who actually published All-Star) and half by DC Comics themselves, making this an inter-company crossover. (The companies would later merge). It also used to be claimed as the first example of characters created separately, and with no intention of them being connected, interacting. It isn’t. There are countless examples in the pulp fictions of the late nineteenth century, but the claim stood for so long because it felt right that the original super team should be the source of such meta-fictional innovation.

The Defenders were created much later in comics history and first appeared in 1971’s Marvel Feature #1. The team, though, had its origins in the "Titans Three" an informal grouping of heroes who appeared in a three part story serialised across Doctor Strange #183 (November 1969), Sub-Mariner #22 (February 1970), and The Incredible Hulk #126 (April 1970).

All three of those comics were written by Roy Thomas. Caught on the hop by the sudden cancellation of Doctor Strange (#183 was the final issue), he wrapped up ongoing plotlines from the cancelled comic in other series he scripted, bringing the now title-less Strange into those other series in the process. A couple more appearances of the group together followed, before the team was formally named in the aforementioned Marvel Feature #1.

Dr Strange. The Sub-Mariner. The Incredible Hulk. It’s quite likely that anyone reading this who is only familiar with the publicity for Netflix’s The Defenders would be surprised by that roster of headline characters. (And that’s assuming they’re even familiar with Namor the Sub-Mariner, a character of 1939 vintage who has not yet reached the MCU.) This is a radically different group to Daredevil, Jessica Jones (a character not even created until the 21st century), Luke Cage and Iron Fist, the stars of the current TV series. None of the telly team are characters a Marvel zombie would associate with The Defenders, although Iron Fist has been a very occasional member of the team’s roster, as has Luke Cage. (In which context, it’s unfortunate that Iron Fist has been the least liked of Netflix’s series, with a mere 17 per cent approval on Rotten Tomatoes.)

The complete absence of all three of the original Defenders from its television incarnation could be seen as an odd decision. Neither Benedict Cumberbatch’s Steven Strange nor Mark Ruffalo’s Bruce Banner are expected to turn up, even for cameos. Marvel Studios has policed a strict division between its Netflix series and its cinematic outings, despite announcing them as being set in the same "continuity". The fourth "classic" Defender is even less likely to turn up. The Silver Surfer (who joined the team in 1972, less than a year after it was formed) is, due to some bad deal making in the 90s, off limits to the MCU. His film rights sit with Fox, who utilised him in the rightly all but forgotten Fantastic Four: Rise of the Silver Surfer (2007). 

One of the reasonably consistent features of previous incarnations of The Defenders is that the characters have generally faced mystical threats. They first teamed up to fight monsters from HP Lovecraft’s Cthulhu Mythos, and generally their antagonists have operated on that kind of scale. With Stephen Strange in the gang, that makes sense. You don’t need the sorcerer supreme to take out organised crime. But organised crime is largely what you’d expect Daredevil, Luke Cage, Jessica Jones and Iron Fist to take on, especially based on the Netflix versions of the characters. All four are "street-level" heroes, operating in New York, interacting with characters like murderous vigilante The Punisher and Kingpin of Crime Wilson Fisk. Perhaps splitting the difference, their team up series will see them take on The Hand. This is a ninja organisation, with mystical origins, that is nevertheless involved in organised crime and can be presented, as it has been so far for Netflix, within the context of crime stories.

Marvel’s Chief Creative Officer Joe Quesada has defended The Defenders being The Defenders by pointing out that the original team are largely unknown outside comics fandom, and their name means nothing to the public at large. (Although they have, of course, heard of all three of its constituent members.) Of course, for some this might sensible provoke the question "Why use it then?" What is this series called The Defenders at all?

The (original) Defenders were seen as a "non-team", a phrase occasionally used in the pages of their appearances. There was something deconstructive about this kind of team up. It was the pairing of characters who were unsuited to working, even to appearing, together and who would really rather not. (They had, after all, been brought together in the first place simply because Roy Thomas happened to write their separate titles.) The stories told with the group in some ways challenged and confronted the cliches of the decades old form that had begun back in All-Star Comics #3.

The line-up, and tone, of Netflix’s Defenders more resembles that of another, deliberately slightly interrogative non-team, that of the short-lived Marvel Knights book of 2000-2001. This did share The Defenders somewhat abstract definition of "team", featuring characters who didn’t like each other and didn’t want to work together, albeit without any mystical element to how they were brought together. Marvel Knights was also, in theory, the flagship of the line of the same name, at the time edited by... Joe Quesada. Hmm.

In recent years, Marvel have frequently cheerfully remodelled their comics - the original medium for almost all their characters - in order to incorporate changes and innovations pioneered as part of their film and television projects. Remixing their characters and the way they are grouped together in response to the success of their screen empire. The Guardians of the Galaxy, for example, have become more prominent in the comics, while characters whose film rights lie with film companies other than Marvel’s own, such as the aforementioned Fantastic Four, have been pushed to the margins. Accordingly, this August sees the launch of a new The Defenders title, featuring the lineup of characters from the television series.

Some loyal comics readers see this a case of the tail wagging the dog. Others might like to take notice of the metaphor used by comics writer Grant Morrison in his 2011 book SuperGods: Our World In The Age Of The Superhero. There, Morrison argued that comic books, while the medium in which these characters were created, was essentially the discarded booster section of the rocket in which they had been fired into the public consciousness, reaching vastly greater audiences in the process. 

“That’s not The Defenders,” commented a friend of mine on seeing a publicity photograph for the series a few weeks ago. It is now, mate. It is now.